I have 3 AppleTVs. They are all connected by ethernet. One is the HD @ 100Mbs, the other 2 are the current model 4K models @ 1Gps. All the user profiles are correct, etc. My internet connection is 5Gps symmetrical. The sync from iCloud on any of the AppleTVs takes on the order of 5-10 minutes. No other iCloud actions takes this amount of time. The lag in the sync makes moving between TVs to watch something very painful. Looking for advice on what is going on here. I am in tech and have a deep understanding of networking and have done all the standard checks, no connectivity issues, no dropped packets, no DNS issues, etc. All AppleTVs are running 18.3 release.