Syncing Messages Across All Devices, NOT
I did find a lot of old threads, all now closed, that spotlight this issue. Now this isn't an everyday occurance, but has happened several times. My main concern is between my 18.2.1 iPad and my 15.2 M4 mini. Every now and then, I look at it on my desktop and messages I write on the iPad are not transferred over. Yes I have it iCloud synced everywhere. The supposed "trick" of going into Messages settings and use the "Sync Now" button. Just tried that, didn't work, there is several posts made on the iPad that are NOT coming over to the desktop.
I did make another post on my iPad while my desktop was running and NOW see the previous messages show up on my desktop. I consider this a bug that Apple needs to fix. I'm posting to see if other run into the same issue. After 18 major iOS upgrades and 15 macOS, this should NOT be happening.