Autosave sometimes does not work and gives different "Could not save property" error popups.

Sometimes the autosave does not work and gives one of the below errors in a small popups:

"Could not save property. The page may have been changed by another user. Please reload the page"
"Could not save property, Please reload the page"

Reloading, as the error message suggests sometimes works. But, other times it leaves all fields locked for editing, and you need to click on to another page and then back to re-enable editing - and start over.

Has anyone experienced this and eventually have some tips for debugging and solving it?

It's CMS v12.22.1

Thanks in advance and best regards.