tablet not syncing

Hi! I have a galaxy tab s6 lite tablet with Android 11 installed. I have an issue with edits syncing in Lr. 
I installed Lr cc on my main computer and my tablet (v7.1.1)
On the computer, all the changes that I make (edits) sync in real time, no problem. When I make changes/edits from my computer, my tablet will generally sync the changes dans display the edited version. 
On my tablet, I can sync easily my rating and the flag status witout any issue (and see it on my computer afterwards) but the edits just don't sync. The sync status (top right corner) will generally remain on "+" (not normal from my other experiences). When I "force sync", it will sync (blue circle for uploading then change for a check). However, when I go back to the main menu or from one photo to an other, I can see that the changes are actually not saved (I will first see the edited picture when I come back to it and then display the original picture without the edits). 
I tried, without success, to: log in/out, uninstall/install again, reduce the number of pictures in the folder, force sync, access all permissions with the app manager.
Do you have any other ideas for making it work? Thank you!!