I have found that if I leave an open page of Nextcloud (Files app, Calendar app whatever) in my browser for a long time not visited and come back to it, the refresh is not done sometimes (in Calendar and Contacts app), so the data becomes outdated or done with a slight delay in Files app.
If I have an open file in OnlyOffice and come back later to it, I see a message, that the data are outdated and need syncing, which is not done automatically so the UI becomes gray and not available, or the refresh circles turns around neverending. Mostly I have to refresh the page in the browser manually.
What may be improved here in order to make the pages more responsive and automatically refreshing, eg like in Google Docs?