I've post a Github Issue on Nextcloud/Richdocuments apps.
But there aren't some move on it, so i post here if someone have a clue to solve this.
I've tested it with Collabora Docker and LibreOffice Online compiled from stratch.
Open a document or a spreadsheet.
Do some stuff inside, let's say on a spreadsheet you are on line 56 on column T.
Save the document, and leave.
Reopen it, you will start at the begining of the document.
On older versions of the apps, it worked well.
It's strange that when you reopen a spreadsheet, your cursor is where it was before leaving, (ex : line 56 on column T), but the screen is at the start of the doc.
Do you experience the same problem ?