Was using 2.8.4 on Linux Mint as my "master" and my Android 12 and IOS 15.4.1 devices were not matching note wise. I've been using S3 reliably for nearly 1.5 years. In the past, updating the Linux version typically resolves these kind of issues, and can confirm that 2.8.5 fixes things for me.
That said, assuming that the version update hadn't resolved things (BTW, there were no sync errors, just not matching on the mobile side, I was prepared to bite the bullet and move to Joplin Cloud.
If/when I decide to change sync method, what should my process be? Should I just wipe the remote (IOS and Android) versions of Joplin and sync from scratch? What's best practice for doing this sync method migration?
I have good reliable file system level backups on the Linux desktop side of this just in case.