Some notes not syncing

Operating system

Linux

Joplin version

3.5.12

Desktop version info

Joplin 3.5.12 (prod, linux)

Device: linux, Intel(R) Core(TM) i7-7660U CPU @ 2.50GHz
Client ID: b10ca3264f6240129ca2f839a6f59ec7
Sync Version: 3
Profile Version: 49
Keychain Supported: No
Alternative instance ID: -

Backup: 1.5.1
Freehand Drawing: 4.2.0

Sync target

Dropbox

What issue do you have?

I have four Linux w. Joplin syncing to DropBox. On one I create a new note within a notebook. It does not appear on the other even though both say they are syncing, fetching and updating without errors. I have no idea how to fix this as there are now two different sets of notes, this might have happened with other notes too. How can I make the sync work without losing any of my notes on any Joplin instance, please?