Plex no longer syncing rating tracks from offline use

I generally rate my songs in Plex, because I haven’t been able to trust iTunes’ sync in years. Usually, it’s rock-solid. I’ll sync songs offline to my phone, rate them on the go, and sync them back to my server. In the last month or so, I’ve found that rating songs while I’m offline will just erase that info when I sync. Anyone else experiencing this one?