So I have posted about his one in the past because it really affects me. I hate having the monitors as separate spaces as it messed up just how I use the computer. Now it has been better with newer versions of Premiere and Mac, but is still there, and I do a lot of restarting Premiere to clear it up.
Luckily Adobe Employee Kyle Plumadore has an update:
Hi all – another update:
Apple has identified the source of the bug. I anticipate that it will be fixed in a future MacOS update. My understanding is that it’s a complex bug to fix, so it may take additional time to get fixed in the OS.
To facilitate a quicker improvement for users, Apple has also provided us with an application side code change which will workaround the bug. This change is available for testing now in the latest Premiere Pro Beta (24.2.0.34) dated 2023-12-01. I’ve verified it myself but if anyone else experiencing this bug wants to validate that this Beta version (or newer) also solves the problem on their end, that would be helpful. If we don’t find any negative side effects as a result of this workaround, it will be available in a future non-Beta version of Premiere Pro as well.
As I mentioned above, I also expect an eventual MacOS update to resolve this issue. This will be useful for those users who do not wish to update their versions of Premiere Pro.
I will provide another update when I have concrete Premiere Pro (non-beta), or MacOS version numbers which resolve the poor playback when “Displays have separate Spaces” is disabled.
Kyle Pukmadore – Adobe Employee
So there is a workaround in the latest Beta, and at least Apple knows what is causing it, I bet they want to fix it before the M3 Ultra comes out.