Weird Sync Issue

Operating system

Windows

Joplin version

3.5.13

Desktop version info

Joplin 3.5.13 (prod, win32)

Device: win32, Intel(R) Core(TM) Ultra 7 255H
Client ID: c0d78f252f4d4639a4d54edafc33e72a
Sync Version: 3
Profile Version: 49
Keychain Supported: Yes
Alternative instance ID: -

Revision: 0c1511f

Backup: 1.5.1
Freehand Drawing: 4.2.0

Sync target

Joplin Cloud

What issue do you have?

First I had setup Sync over Dropbox, and set it up on 2 desktops, one Android tablet and one Android phone.
Then I upgraded to Joplin Cloud Pro.

On desktop #1 I imported all the notes from Evernote, merged some notebooks and did a cleanup.

Now, both tablet and phone are synced to the same state as desktop #1 (though I still have an issue with android phone and message "Some items cannot by synchronized. Press for more info.")

BUT, desktop #2 finished the sync (like 6 hours ago) and is showing the notebooks in it's un-merged state, like no other device has it.
Where does it get that sync information from????

I tried:
Deleting .conf folder under the user profile to start from zero.
Options/Synchronisation/Advanced ->
Delete local data and re-download from sync target

... and it's still showing notebooks in a state when the were not merged.

I don't know what else to do!

Now if I press Synchronize it finishes in 3 seconds.

BTW, all the tags are also missing!

I think this should not be happening, the SYNC should just WORK! That's the whole purpose of it.