Why was the way screenshots were handled changed?

Let me confirm this too.

please fix this - its very irritating and caused by dropbox, i am at the point of wanting to cancel dropbox, because i use screenshots daily.  Sequoia 15.4 macOS

this exact issue, its also a reddit thread. 

"After disabling the "Show floating thumbnail" option in your MacOS screenshot settings, it's being re-enabled (i.e., the MacOS thumbnail is popping up again) randomly; and this seems to only happen when you've got Dropbox running?"

Hi everyone - We have a fix for this issue out in V.222, which is available now. Thanks for letting us know about this so we could correct the problem!

The bug is still persisting for me.  I upgraded to v222.4.5042

does not seem like its fixed. 

running sequoia 15.4.1

the bug can be replicated with the new v.222, just close and restart dropbox.  the menu item for "show floating thumbnail" in mac screenshot settings gets activated again. 

I'll follow up on this for v.222! These settings are sticking for me on the upcoming version, so a fix is definitely expected.

I have 'Remember last selection' checked and 'Show floating thumbnail' unchecked. 

Hi, I'm on v222.4.5042, and this does not seem fixed.
Bug: Dropbox turning the "Show floating-thumbnail" back to On while it was Off, and should stay Off.

The problem is that it can take an undetermined amount of time to re-occur. eg. I’ve manually set "Show floating-thumbnail" to off Sunday apr20, then all seemed fine, took some more screenshots Mo apr21 Afternoon, then suddenly when taking another screenshot in the evening, the floating-thumbnail showed up again. In the meantime, I change none of the settings. 
(What I did Apr20 to be exact:

• in Dropbox itself under Screenshots > Save screenshots to Dropbox is off.
• In MacOS I have pressed Cmd + Shift + 5 to show the Screenshot settings menu, and set "Show floating-thumbnail" to Off,
• “Remember last selection” is On. )

What I found to immediately trigger the bug is by in Dropbox simply toggling the “Screenshots > Save screenshots”-toggle On and Off. That is, when it’s Off, toggle it On, then immediately Off again. When I now press Cmd + Shift + 5 to show the Screenshot settings menu "Show floating-thumbnail" is now turned back On.

So I am able to trigger to bug through this proces, however, it ALSO happens on it’s own after a certain period, which could be related to a timer or perhaps MacOS going into hibernation mode, then wake again. Perhaps on wake Dropbox does some re-initialization or smt.

In my experience it’s either after 3-4hrs, or the next day before the bug re-occurs. But hopefully going through the code with above reproduction-steps is enough to squash both bugs. 

Good luck! I’m sure many of us are waiting with great anticipation for the final fix to be rolled out.

Thanks for the detailed information, it was very helpful! We have a fix in process for this version of the issue now.