As per the issues logged
Collabora stops working after a few hours 路 Issue #2857 路 nextcloud-snap/nextcloud-snap 路 GitHub and
Development Edition stops after a few hours? 路 Issue #3936 路 nextcloud/richdocuments 路 GitHub
I have no idea why the editor errors for a few seconds then works like charm for the entire day but the same thing happens again after 2-3 days when the editor has not been used.
I run on a xeon 4 core 8 threads, 64gb ram with plenty of storage and completely under utilized load basically just nextcloud.
Would be great to have a way to keep the editor warmed up of some sort so is always spot on.
I also noticed the same behavior if I share a file the viewer gets the same unable to open file error for a few seconds/retries and then works perfectly.