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iOS 27 Beta 4 ― Bug Fixes, Changes, and Improvements

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The first post of this thread is a WikiPost and can be edited by anyone with the appropiate permissions. Your edits will be public.
nortonandreev said:
Yes but each time you install new 27 build, indexing starts over.

So the 26.6 could potentially be good just for the first time you move to 27, then each subsequent update will trigger the reindexing again.
Click to expand...
Ehm how do you know? That’s just “trust me bro” at this point.
This might be true due to the beta phase but you most likely won’t run into such a heavy indexing again with further and smaller updates.
 
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Reeneman said:
Ehm how do you know? That’s just “trust me bro” at this point.
Click to expand...
I meant based on what we have been seeing now, during the beta. I didn’t say it will for sure be like this afterwards.

However, for all of the previous releases, even if stable, indexing is happening after each update (usually, on macOS I didn’t see indexing happening moving from Beta 3 to Beta 4, which is positive).

If they manage to make it short and quick, okay. If it’s 1-2 weeks after each update, doesn’t feel nice.

Especially for users who don’t benefit from it.
 
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H3LL5P4WN said:
Has anyone been able to test CarPlay yet? I started having disconnects last beta, too.
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Miles better (pun intended 😉) for me in this beta. Just finished a 1h 40min drive with a wired CarPlay (Renault). No issues, whereas in previous betas it would repeatedly cut off. Will do the same trip in the opposite direction tonight and will report back if anything.

Update: still three disconnects during about a two-hour drive.

Update 2: It looks like after all my CarPlay issues were caused by some intermittent issues with the Anker USB A to USB C cable. Yesterday I was driving another car fitted with the same cable, which was bought later and used much less, and had zero dropouts during a long drive. So today I plugged this “good” cable into my usual car (which used to have disconnects) and drove for about three hours with zero dropouts. What is strange, however, is that the “bad” cable had no issues working in my car with an iPhone 15 running iOS 26.5.2, yet would be having lots of dropouts with my iPhone 17 and DB4. Is it possible that iOS 27 feeds more data so my “bad” USB 2.0 cable gets “overloaded” and drops the connection, whereas its younger twin manages to handle it? Anyway, I have now ordered a UGREEN USB 3.0 cable, so it should resolve it.
 
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nortonandreev said:
I meant based on what we have been seeing now, during the beta. I didn’t say it will for sure be like this afterwards.

However, for all of the previous releases, even if stable, indexing is happening after each update (usually, on macOS I didn’t see indexing happening moving from Beta 3 to Beta 4, which is positive).

If they manage to make it short and quick, okay. If it’s 1-2 weeks after each update, doesn’t feel nice.

Especially for users who don’t benefit from it.
Click to expand...
It’s still a beta 🙂
 
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Ethan.Albano said:
AutoCorrect keeps going out to lunch on me in messaging apps. Completely stops fixing things such as punctuation in contractions or misspelled words.
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I've had this through the whole iOS 26.x branch and it's still not fixed in the iOS 27 betas. Filed the bug report for iOS 26, will file a new one for iOS 27.

I've tried everything, reset the keyboard setting, deleted all custom text replacements, toggled all possible settings, to no avail.
 
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ManuCH said:
I've had this through the whole iOS 26.x branch and it's still not fixed in the iOS 27 betas. Filed the bug report for iOS 26, will file a new one for iOS 27.

I've tried everything, reset the keyboard setting, deleted all custom text replacements, toggled all possible settings, to no avail.
Click to expand...
Having this problem too. Are you using multi-language keyboard too?
 
nortonandreev said:
I meant based on what we have been seeing now, during the beta. I didn’t say it will for sure be like this afterwards.

However, for all of the previous releases, even if stable, indexing is happening after each update (usually, on macOS I didn’t see indexing happening moving from Beta 3 to Beta 4, which is positive).

If they manage to make it short and quick, okay. If it’s 1-2 weeks after each update, doesn’t feel nice.

Especially for users who don’t benefit from it.
Click to expand...
If you never went into the settings, you’d never even know it was indexing. It’s really not a big deal at all. Phone runs perfectly fine.
 
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OCS12 said:
It crashed on me three times during the hour long drive this morning.
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I also had CarPlay crash on me this morning (2025 Subaru Outback.) I had them often enough on B1 and B2 that I considered going back to iOS 26 but B3 seemed to reduce them for me. So I'm not thrilled that I've already had a couple on B4.
 
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one more said:
What do you mean by a “crash”, a total loss of CarPlay connection or a specific app crashing?
Click to expand...
Everything Carplay related shut down, as if the phone didn't exist. After about two minutes, Carplay would start back up. This was on wireless.
 
iCrow said:
It will be like this until the third-party apps are updated for the official release...
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Doesn't that just mean if the apps are updated for the official release? It seems Apple often allows developers to opt out of updates such as this.
 
Maybe I never noticed it, but now when I play a video on mute that I recorded, Siri AI puts captions automatically. I have to turn it off each time. Annoying. I haven't looked on where to turn it off permanently.
 
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OCS12 said:
Everything Carplay related shut down, as if the phone didn't exist. After about two minutes, Carplay would start back up. This was on wireless.
Click to expand...

I have been having this type of issues on and off with wired CarPlay since iOS 27 DB1. For me it seemed to get noticeably worse with DB3, but seemed to have improved greatly with DB4. Will be testing it some more later today…

Update: still three disconnects during about a two-hour drive.

Update 2: It looks like after all my CarPlay issues were caused by some intermittent issues with the Anker USB A to USB C cable. Yesterday I was driving another car fitted with the same cable, which was bought later and used much less, and had zero dropouts during a long drive. So today I plugged this “good” cable into my usual car (which used to have disconnects) and drove for about three hours with zero dropouts. What is strange, however, is that the “bad” cable had no issues working in my car with an iPhone 15 running iOS 26.5.2, yet would be having lots of dropouts with my iPhone 17 and DB4. Is it possible that iOS 27 feeds more data so my “bad” USB 2.0 cable gets “overloaded” and drops the connection, whereas its younger twin manages to handle it? Anyway, I have now ordered a UGREEN USB 3.0 cable, so it should resolve it.
 
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