I had a similar problem and I tried a lot to find a way to reproduce this error but I couldn't find a way to do so. I think this issue is related to: Sync with OneDrive fails · Issue #3237 · laurent22/joplin · GitHub. Also I think the issue is not related to one specific platform but it is something going wrong during the sync process with multiple devices. In my case I had no synchronization problems between linux and android using OneDrive. But yesterday I installed joplin on a Windows machine and in this case some notes just have been ignored. Out of curiosity I then tried to install joplin on another (virtual) Linux device and it had the same problem as on Windows. I solved the problem with the following steps:
- Exported all my notebooks to a .jex File (luckily I had one machine with all notes)
- Deleted the joplin-desktop folder
- Cleared all data from android version
- Deleted the joplin folder in onedrive
- Imported the .jex File again to Joplin and logged in to Onedrive
Since then I didn't have any problems (but it was just yesterday so maybe the problems come back). The disadvantage is obviously that all notes had to been uploaded again. Unfortunately I forgot to make a debug log 