Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
I just encountered the same issue here😢
As I’ve said several times, it takes time for users to notice this issue. It doesn’t appear on the first days. Many people doesn’t seem to recognize it either.

Let’s go everyone and report this to Apple. It has to be fixed next Monday on public IOS16.
 
I really don’t know what’s causing this. I can assure you that if I buy 1000 iPhones, all of them will have tue bug if I apply my settings, install my apps and log in to my iCloud account. Some people doesn’t have it because of specific settings and apps. Probably less apps. One person in this forum has already said that they had their phone exchanged and had the same issue with the new one. Another guy said their work iPhone didn’t have but the personal one did (number and type of apps?)

As mentioned, I don't see it and under App Settings, I have approx. 230 apps and am using 143GB of 256 installed.
 
A little history from this thread: https://forums.macrumors.com/threads/12-pro-stutter-when-closing-apps.2263484/

  • At some point in iOS 14, we started seeing this animation stutter when swiping up to go home. It was bad and got worse over time (until a device restart)
    • It was so bad in fact that it would often interrupt the action of going home and throw you into the app selection screen
  • It was completely hardware agnostic. It didn't matter what model of iPhone you had or even what apps you were using
  • This persisted for many months. We have reason to believe it was VERY widespread (100%?) and that some people were a lot more sensitive to the stutter than others. I remember seeing it random b-roll on a MKBHD video and no one batted an eye
  • Regular support was unhelpful and often just suggested that people factory reset the device (it only helped for a while)
  • I certainly don't mean to take credit, but after months of it, I was losing my mind. I sent one of those angry emails to the tcook address and a member of the executive support team called me the next day
    • Over the next couple of days, they had me install a special piece of diagnostic software and also run in a super high diagnostic mode for the next 24 hours. They wanted me to log when I saw the stutter. I stopped logging after the first 50 or so
    • A week later, Apple reached out and told me that they found the issue from my logs and are working on an immediate fix
    • A couple days later, build 18E5154f was released and this specific stuttering bug was finally squashed
All good for about a year and a half.

Then, a flash of PTSD when a couple hours after I installed one of the iOS 16 betas, I experienced the very same issue on my iPhone 13 Pro Max.

I immediately opened detailed feedback (that hasn't been touched since beta).

The issue has been in every iOS 16 and iOS 16.1 release since, even to this day.

A couple things to note about this one:
  • It is also hardware agnostic, though maybe a little less so (how quickly the issue surfaces)
    • I saw it on my iPhone 13 Pro Max
    • I saw it on my iPhone 14 Pro Max
    • I saw it on my iPhone 14 Pro
  • It does not seem to be quite as widespread as before
    • I do NOT see it on my wife's iPhone 14 Pro Max (yet?)
      • I looked for any difference in settings, usage, etc. Was unable to reproduce it
This still sucks. It's frustrating that there isn't any noise about it in the media. And it's frustrating to think that we might have to deal with it for another 6+ months like last time.
I posted about this issue that was seen previously on iOS 14. Glad I found this thread. I couldn’t remember if it was iOS 14 or 15 but I remembered how annoying this bug was until they fixed it. Can’t believe it’s back. Here’s to hoping they squash this sooner rather than later. But I’m not going to get my hopes up.
 
  • Like
Reactions: antiga
I posted about this issue that was seen previously on iOS 14. Glad I found this thread. I couldn’t remember if it was iOS 14 or 15 but I remembered how annoying this bug was until they fixed it. Can’t believe it’s back. Here’s to hoping they squash this sooner rather than later. But I’m not going to get my hopes up.
Yeah. While I don’t see this on my 14 PM, I did have it back then on my phone at the time.
 
@antiga Yes, this regression is very frustrating. It actually started for many people with iOS 13. We suffered with it for over a year until the finally fixed it in 14.4. I'm worried the same might happen with iOS 16. I'm an iOS developer and I sent them feedback and logs for over a year before it was finally resolved. The issue is with how iOS manages memory. In iOS 13, Apple increased the amount of apps that can run in the background before being terminated. That increase seems to have caused some performance hits on the system. Honestly, I wish they would go back to how it was before. I'd rather have a smoother experience than more apps resuming from their background states. It's probably going to take another year's worth of people complaining before they look into it again. My question is how do all the execs (Cook, Federighi, etc.) use their phones on a daily basis and just accept this? Wouldn't they be embarrassed by how laggy/stuttery their new flagship phone is?
Best to just leave this question unanswered…
 
16.1 Release dropped about an hour or two ago.

There is actually is a new build number (you will have to remove your dev/pb beta profile to see it). So there's a tiny shred of hope that something changed.

I'm installing now and will report back.
 
16.1 Release dropped about an hour or two ago.

There is actually is a new build number (you will have to remove your dev/pb beta profile to see it). So there's a tiny shred of hope that something changed.

I'm installing now and will report back.
I have this stutter on my 14 Pro Max running 16.1. It’s intermittent though. It’s almost like the animation pauses briefly when closing the app. It seems to happen mostly (but not exclusively) when you open an app that’s not previously open/in memory, and then close it.
 
Last edited:
  • Like
Reactions: potassium404
Haven't noticed it anymore since updating to 16.1 yesterday. Scrolling is super smooth now too.
 
It persists after all. There are some people trying to say it’s not a widespread issue (I really don’t know their motivation) but it’s certainly a generalized bug.
 
16.2 Dev Beta has been seeded.

Will try that next - it's downloading now.
 
Last edited:
I do usually have a stutter or two by now. Trying not to get my hopes up.

So far so good.
 
A little history from this thread: https://forums.macrumors.com/threads/12-pro-stutter-when-closing-apps.2263484/

  • At some point in iOS 14, we started seeing this animation stutter when swiping up to go home. It was bad and got worse over time (until a device restart)
    • It was so bad in fact that it would often interrupt the action of going home and throw you into the app selection screen
  • It was completely hardware agnostic. It didn't matter what model of iPhone you had or even what apps you were using
  • This persisted for many months. We have reason to believe it was VERY widespread (100%?) and that some people were a lot more sensitive to the stutter than others. I remember seeing it random b-roll on a MKBHD video and no one batted an eye
  • Regular support was unhelpful and often just suggested that people factory reset the device (it only helped for a while)
  • I certainly don't mean to take credit, but after months of it, I was losing my mind. I sent one of those angry emails to the tcook address and a member of the executive support team called me the next day
    • Over the next couple of days, they had me install a special piece of diagnostic software and also run in a super high diagnostic mode for the next 24 hours. They wanted me to log when I saw the stutter. I stopped logging after the first 50 or so
    • A week later, Apple reached out and told me that they found the issue from my logs and are working on an immediate fix
    • A couple days later, build 18E5154f was released and this specific stuttering bug was finally squashed
All good for about a year and a half.

Then, a flash of PTSD when a couple hours after I installed one of the iOS 16 betas, I experienced the very same issue on my iPhone 13 Pro Max.

I immediately opened detailed feedback (that hasn't been touched since beta).

The issue has been in every iOS 16 and iOS 16.1 release since, even to this day.

A couple things to note about this one:
  • It is also hardware agnostic, though maybe a little less so (how quickly the issue surfaces)
    • I saw it on my iPhone 13 Pro Max
    • I saw it on my iPhone 14 Pro Max
    • I saw it on my iPhone 14 Pro
  • It does not seem to be quite as widespread as before
    • I do NOT see it on my wife's iPhone 14 Pro Max (yet?)
      • I looked for any difference in settings, usage, etc. Was unable to reproduce it
This still sucks. It's frustrating that there isn't any noise about it in the media. And it's frustrating to think that we might have to deal with it for another 6+ months like last time.
Glad to see my old post from the 12 Pro is alive and well. :)

Anyway yeah I’m on a 14 Pro running 16.1 and after a day it’s been stuttering pretty bad still. Obviously some kind of software/RAM-filling-up issue like it was back with the 12 Pro which they eventually fixed, so I’m just trying to be patient. I’m not running betas, so no real way to report the bug in a useful way.
 
  • Like
Reactions: antiga
I do usually have a stutter or two by now. Trying not to get my hopes up.

So far so good.
Typically it's about 3-4 hours for me before it starts happening. Of course, they could have just made changes where now it take a little longer to start happening.
 
  • Like
Reactions: antiga
Typically it's about 3-4 hours for me before it starts happening. Of course, they could have just made changes where now it take a little longer to start happening.
Yep, they might have improved it but not eliminated it entirely. I can’t help but be pessimistic about it.

I will say, I haven’t had one yet. And I definitely would have had a ton by now with any of the other last 10 builds I’ve tested. Things are looking promising here.
 

Expanded 120Hz ProMotion Support​

On devices that support ProMotion, Apple says that SwiftUI animated layout changes will support a 120Hz refresh rate, functionality that was previously missing- would this be our necessary update?
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.