Bumping this up. The limit for image sequences is definitely less than a total 500kb for the sequence. I couldn't make a 450KB sequence work, after multiple steps I dropped it down to a 6-frame 83KB sequence and finally that did the trick.

I’d like to be able to maintain an ultra wide screen sharing connection from my macOS desktop to my headset, and then have that connection remain in place if I remove my headset for 5 minutes to take care of something in-office. Unfortunately when I remove my headset even to run to grab a cup of coffee from the machine, the connection goes away, my computer reverts to its normal monitor setup, and all my application windows switch to new locations and sizes. I’m not concerned about security, this is in a locked office. I just want to have the option to maintain the screen sharing (sidecar?) connection for a decent period of time when I’ve temporarily removed the headset. Keeping the rest of its state and windows and apps in place might also be nice.