My iMessage doesn't seem to be syncing to all my devices all the time. If someone send me a message I may get it on my iPhone, one of my iPads, but not my other iPad, and my iMac. Then, sometimes I got it on every device but my iPhone. It is strange. All my devices are on the latest iOS 13.1.2...and My iMac is on the latest Catalina beta. Any ideas?