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.