14.3 Mail.app - Corrupted/Garbled Text When Composing Messages

Yes, I thought it may be an isolated incident. Not only did it persist in Sonoma (Macbook Air M2) but also on my iPhone 15 version 17.4.

It is past annoying. As the author above notes, three to four paragraphs in and then your text becomes corrupted, you backspace, and it may or may not change back to a few past sentences, and you must start the text over again. Then, it will begin to corrupt again; you either backspace or hit the spacebar, and it is anyone's guesses how much-written text you lose. 1. Could it have something to do with autocorrect because it is happening in the Mail App on MacBook and iPhone? 2. Is anyone using a 3rd party grammar checker, like Grammarly? The bottom line is that its frequency and annoyance need immediate remediation. Has anyone solved this issue?

Turning off / on inline predictions won't change anything. The problem seems related with text rendering / formatting as paragraphs are typed. If it's a one-liner type of response (being typed), probably no issues. When the text wraps a paragraph, that's usually the first thing to trigger it. Whether it's a new email vs replying to email (with text below the reply from the previous email exchanges) factors into the calculus somehow too.

Last week I said I was seeing it in Mail. Over the weekend, had the same issues in Safari when typing exchanges in user forums. Others have reported the same (in this post), so just adding my name to the list so to speak.

I'm having the same issues: M2 Max laptop, Sonoma 14.3. And it's driving me NUTS. If I had the option to write two sentence emails, I would text.

Once the text garbling starts, I've resorted to saving the offending email as a draft and rebooting. Then I'm good for one or two emails before it starts again. OR I've also been composing emails in Word or Pages or InDesign and then copying/pasting them over to my email. Neither are acceptable.

Please fix Apple!

I appreciate anyone raising a hand or posting. It shows how many are dealing with this insanity and the hope it gets fixed! I have stopped doing any lengthy emails because of it and try not to email (impossible). I have attempted other emails Google , Protonmail, and the same issue persists. I have seen display issues on Safari and in messages as well. This bug/display is not just an email-related issue.

Thank you all for who are posting. Yes, me too, or raising a hand. It is helpful when someone is searching for wtf is going on and looking for a fix to this issue. It is not your device. It is an Apple buck-up & we are all waiting for an update to resolve it.

Some emails I receive on this post do not appear here, or like another poster, stated, I don't see it (they are all mangled). This was the most hopeful post I received yesterday, and I appreciated it. Google the below; maybe a link is not allowed here. Thanks, apmeyer, for the hopeful news!

apmeyer has posted in the Other Apple Applications and Services community. 

"Sounds like a fix is on the way. Can't come soon enough.

macOS 14.3 Sonoma Text Display Bug to Be Fixed Soon"

I just updated my computer to 14.3.1. I don't want to jinx anything here but I just wrote a long email and for me it seemed the problem is totally gone. Will see but I am hopeful this garbled text deal is behind us!

Upgrade to MacOS 14.3.1.

It should fix the problem, which was in WebKit. The software update explicitly says it is a fix to this erratic display problem when editing. In addition to Apple Mail, this was occurring in other apps that use WebKit.

It's a bit scary to see something like this with a brand new computer, and wonder if something is wrong with the new M3 Pro Apple Silicon hardware. I certainly did, until I saw in this forum that it was happening to many different computers, including ones with Intel processors.

This display issue when editing is a documented software bug that 14.3.1 should fix.

I would like to suggest that there is no point in posting more "me too" messages. We should concentrate on getting a consensus on how to cope with it until Apple fixes the bug. Scanning through the previous messages, everyone seems to agree that it's a problem with the display, not the underlying text, so all that is needed is a way to force a refresh, either by:

1. resizing the window.
2. selecting all the text with ⌘-A (you may need to deselect it before it corrects itself completely).
3. just typing on until it clears itself, although that can be hard when you are typing through mangled text.

All three have worked for me. Please could people confirm whether one or more of these solutions work for them as well.

I would like to suggest that there is no point in posting more "me too" messages. We should concentrate on getting a consensus on how to cope with it until Apple fixes the bug. Scanning through the previous messages, everyone seems to agree that it's a problem with the display, not the underlying text, so all that is needed is a way to force a refresh, either by:

1. resizing the window.
2. selecting all the text with ⌘-A (you may need to deselect it before it corrects itself completely).
3. just typing on until it clears itself, although that can be hard when you are typing through mangled text.

All three have worked for me. Please could people confirm whether one or more of these solutions work for them as well.

Everyone - the fix is out!

I see the same on M2 Pro Mac mini, has only started happening since moving to 14.3

It seems to happen when text wraps to the next line in a paragraph. I was typing a paragraph and then some text several paragraphs above got distorted.

Same thing on 14 inch M2 MacBook Pro when composing with Plain Text.

Maybe it's happening with Rich Text, but I avoid using that when possible.

It's also happening on my M2 Max MacBook Pro 16". I tried switching from Helvetica to Arial, and that made no difference.