Issues with Premiere 23.5 on M2 Ultra Studio

Preview screen changes output after every restart (Apple Mac Studio M2 Ultra)

I wanted to bring up an issue I'm having with Premiere and After Effects. It seems that they're not consistently keeping the same output monitor for video preview. Whenever I restart my Mac M2US, the output ends up on a different screen. I have 3 monitors connected directly (no hub or dongle). While iOS displays the correct alignment, Premiere and After Effects show the same screen selection inside software as before restart, but now checked screen 2 displays output on screen 3, and checked screen 3 outputs to screen 2. I've tried seeking help by posting a topic about it here on community, but unfortunately, I haven't received any responses.

@Kyle Plumadore sent over the sample logs. I've tried a new project and importing footage slowly but its hard to tell, I feel like as soon as a project gets too "big" it just gives up and stops working. 

@paulfilm_ltd It might be worth adding/removing media to try to isolate at which complexity or with what media the issue starts happening.

Also I sent you a message for uploading the process sample.

Simple/small projects don't seem to have the issue. I've noticed that also media is always pending or not populating at all. I am editing off of an external Crucial X9 SSD connected to thunderbolt, disk speed test shows it is plenty fast. I am not even editing 4K, the footage is shot in 4K UHD but I am editing on a 1080P timeline.

How do I get the sample to you? I saved it as a text file but do not nsee an option to attach files, just images. 

@paulfilm_ltd 

This does sound like a different issue than the one described in the rest of this thread.

Are you able to reproduce your issue with a minimal simple project (e.g. 1 media file) or does it only happen with more complex projects? The multi-display issue largely discussed in this thread was apparent even with playback of a single media file imported into a new project.

Also - next time Premiere hangs can you grab a process sample via Activity Monitor?

Open Activity Monitor and double click the Adobe Premiere Pro process and hit the "Sample" button while it's hung (e.g. when you'd have to force quit). With any luck that sample can help identify what the application was trying to do when it became stuck.

Thanks,

Kyle

I left the second monitor connected and on this morning and worked off of one it was better but still far from ideal. It would just randomly hang and stop responding forcing me to force quit the application.

I am using a pair of DELL U2415 monitors (24" 1920x1200 displays). Primary monitor is connected to the Studio's HDMI and the secondary display is connected to HDMI through a Docktek dongle that has HDMI and a couple USB A & USB C ports.

I had been having issues for a while and assumed it was something when I migrated data over from my Intel Mac Pro. So 2 weeks ago I did a factory reset and set up the Mac Studio as new, no migration, just blank slate and reinstalled my apps. So far its been painfully slow and at times impossible to use.

Not sure how I can share the project, the one I am working on is about 780GB of media. 

I'm on version 24.2.1 (build 2) still laggy and unusabe if I use two monitors. If I disconnect/turn off the second monitor and move my workspace to just one it works ok.