Have been dealing with syncing issues with the last two versions of the app.
I spent the last two days trying to work around by re-importing my notes and taking a few backups from within Bear.
I only have Bear installed on two different Macs.
Both were running macOS 15.4.1 on 5/12 and were upgraded to 15.5 on 5/13.
I think I finally resolved my issue about an hour ago after finishing up another re-import, tag-by-tag, and taking a backup.
When I opened Bear on my other Mac, I noticed the decrepency after a sync.
On one device, more notes show up for some tags, and then on the others, notes from a few tags disappear on sync.
I had to delete all of my notes, wait a few minutes for both devices to sync, and then restore from backup on one device.