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AlmightyKang

macrumors 6502
Original poster
Nov 20, 2023
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Getting really buggy behaviour from Safari over the last few weeks since Sonoma came out. This appears to be mostly related to text layout and placement, particularly in <textarea> controls on web sites. Occasionally actual corruption of page-level elements occurs as well with overlapping text and all sorts of weirdness. Typical examples will be when I'm editing a forum post (anywhere!) with a textarea or equivalent input field, when it wraps it will duplicate a random line of text. So for example, the following the bold line appears where the line two should have been.

This is line one of the post I wrote originally.
This is line one of the post I wrote originally.
This is line three of the post I am editing now...

Is anyone else experiencing this?
 
One text oddity I've experienced is on Google search results. When I mouse over one of the results in Safari, the hyperlinked text changes to a weird serif font. This is on a brand new iMac M3, set up fresh. Have used Font Book's 'Reset Fonts' feature to check for faulty/corrupted fonts and restore standard fonts, but the problem has reappeared since then.
 
Not cache related for sure. It's the rendering engine doing stupid things.

Managed to screenshot it finally!

1704459372583.jpeg
 
AlmightyKang, fans are going to blame you, your system, your apps, etc. but I'm experiencing the same stuff on an entirely separate Mac, running entirely separate apps, etc. There IS something buggy in play. For me in manifests on this very site when typing in some comments to threads like this one. This has been an issue for a couple of months, from pre-Sonoma. There are are few threads about this already on this website: here's one from back in November in which, at the time, I was suspecting this is a MacRumors thing instead of a macOS thing. But since, it has manifested on another site or two and others report the same (on other websites). In that thread, MULTIPLE people with different Macs, macOS, apps, etc are all experiencing this... so it is obviously not exclusive to your system, your software, etc.

Best I know, there is NO user solution. Apple needs to find and fix the bug(s). OR, maybe MR and some other sites are all using the same backend software that perhaps bogs down on load or something like that???

My own observations:
  • It comes & goes. For example, this very post is having no issues at all. One I entered last night had some of what you describe. All other variables except timing is the same: same Mac, same browser, etc.
  • In a few instances, some text I've entered in a thread like this will then appear on the home page in main body content or over in the right sidebar content, overwriting what is actually in those spots. Sometimes scrolling the page will deal with it, sometimes another page load, etc.
  • Besides same text overlaying other text, lines shifting down (looking like duplicates of early content), etc, another symptom is a tremendous slowdown in text entry. I type quickly and when this bug is in action, I'm maybe a few sentences ahead of what is appearing in the text box. And it won't finish what I've typed unless I leave it alone and wait through the very slow entry of character after character. For example, if I notice an earlier typo and click the mouse up higher somewhere to try to fix the typo, the slowly-entering text will continue from that point (creating a much messier typo).
One "remedy" hack when this is happening is open Text edit (app), type & perfect the text in that app, then "select all", "copy" and "paste" it into a website text box. Yes, that's pitiful... but it's a workaround that works until Apple figures out this bug and does something about it (or perhaps the backend code used by MR and others is updated). Pastes have generally been fast when this bug(s) is showing itself vs. the slow text entry effect described above. Paste a complete entry, then click "Save" to post it.
 
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Indeed. It's definitely a bug and not something you can resolve with a cargo-cultish process. Even thought that's a bug too (deviation of expected behaviour). I've spent the last 30 years writing software and I know a bug when I see one.

Glad it's not just me though. I've submitted it to Apple via Safari feedback.

Incidentally if you resize the browser window and force a repaint it will fix itself.
 
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AlmightyKang, fans are going to blame you, your system, your apps, etc.
No need for insults.
I thought the thread was opened to find solutions, not just to complain.
Apple has a page for that https://www.apple.com/feedback/safari.html
I recently made a clean install of Sonoma 14.2.1 and it definitely doesn’t have this problem.
If someone is experiencing the problem on a clean system, then it’s a bug. Otherwise, you might want to look into your own system. Good luck!
 
As I said it comes and goes. So "definitely doesn't have this problem" may persist or may surprise you by it suddenly showing itself today, tomorrow, next week, next month.

I just installed a brand new "factory" Mac given as a Christmas gift: no third party apps at all. Visiting MR as part of just generally checking out the new system, tried to contribute to a thread and bam- there it was. Visited again a few hours later and all seemed perfectly fine again.

And no insults intended: I simply notice that every time anyone posts a potential bug, the immediate assumption is user error... then anything & everything else other than Apple. And even if a thread piles up with others reporting the same issues, some of the same people will then pop into future new threads started about the same issue and again seem to blame the user, blame <anything else> even when they were engaged in the prior thread and had to realize that no, it's not just one person, one person's Mac, one person's app installations, etc.
 
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And no insults intended: I simply notice that every time anyone posts a potential bug, the immediate assumption is user error...
I don't see anyone assuming user error in this thread. I do see some people reporting that the problem isn't universal and every time providing a potential solution to a problem they can't see or test against themselves.

For the record, I'm having this problem to a debilitating degree mostly on this site, but I've now seen it in a few other places. On this site it will scramble the text I'm typing and also scramble some static test I see in other posts-- one time I replied to a post saying "ah, I see you beat me to it" then refreshed the page to find they hadn't, the browser had put my text into their post. It seems to happen most if I go back and edit text I've already typed. I imagine this is what dyslexia might feel like as words are rendered out of order and never the same way twice.

I vaguely remember seeing this happen in a non-browser app at one point as well, but can't remember which one so take that with a grain of salt.
 
Could this be an artifact caused by the predictive text engine? I'm noticing when I edit text in other applications, it pushes text around to make room for the prediction. MR doesn't show the prediction, but I wonder if it's pushing the text around anyway and getting itself confused...
 
I experience this bug very often. I updated from ventura to sonoma few days ago by doing clean install and this bug very often appears for me. On different websites, on very simple HTML pages. I don't use extensions or stuff like that. Hopefully it'll be fixed soon, I'm often forum user and having this bug really annoying like hell. I don't have clear recipe for reproducing it, it seems very random.
 
I'm seeing this same error in several places and it's kind of driving me nuts. It's happening in Safari (sometimes, but not all the time), and also sometimes in my email app, Mimestream (which is excellent btw), and I think a few times in Ulysses. I'm running MacOS 14.3. My "Show inline predictive text" setting is OFF.

I emailed the Mimestream people about it, and it sounds like they're trying to track it down as well:
Could you verify if "Show inline predictive text" is enabled on your system, potentially causing the issue described above? Please navigate to System Settings > Keyboard > click the "Edit…" beside "Input Sources" to check if "Show inline predictive text" is enabled or not (screenshot attached below).

We suspect that this recently introduced feature might be causing an issue on macOS 14.3 in both Mimestream and the Apple Mail app. If you could use Mimestream with predictive text disabled, it would provide us with better insights into this issue (since you've been able to reproduce this issue frequently).
 
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Longshot here -- are you running any Core Audio extensions (aka Audio Units)? There was another thread here where someone's Core Audio extension broke their Safari and Outlook after the upgrade to Sonoma 14.3.

Sounds like voodoo but was verified. The Core Audio extension was installed by some court-specific videoconferencing software that apparently needed its own audio extension. Somehow the current macOS architecture allows a (presumably) wayward Core Audio extension to break Safari and random other apps (I am guessing rooted in some interaction between the system WebKit and Core Audio but now I am just speculating from the few data points available). Simple removing the extensions restored Safari, etc.

Files were in /Library/Audio/Plug-Ins/ and ~/Library/Audio/Plug-Ins
 
I emailed the Mimestream people about it, and it sounds like they're trying to track it down as well:

OK, the dev of Mimestream wrote me back with some interesting confirmation here. Hopefully this means it will get fixed soon:
We confirm that this issue is caused by a bug in macOS, introduced in 14.3, and affects all apps using the system WebKit framework, including Apple Mail (see discussion here). Currently, we recommend you report this issue via the Feedback Assistant app in your system:

Topic: Developer Technologies & SDKs
Title: Text corruption randomly occurs on macOS 14.3
Platform: macOS
Technology: WebKit
 
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