I posted this on the Harmony forum, but didn't get a response. (Hi, Sylvain!, I hope your recent product evaluations went well.)
I am running firmware 3.9.60 and still have a problem with the Ultimate remote losing contact with the hub.
I am pretty sure the problem is in the remote, not in the Hub.
The symptom is that after a period of working perfectly, suddenly and randomly one or more commands in an Activity stop working. Usually it's something I want to happen right now, like Pause.
I believe the remote is at fault because the tiny flash at the top of the display does not appear. The flash appears when a command is being transmitted to the hub.
If I go into Device mode and send the same command, it works. If I go back to my Activity, the command remains inoperative.
If I use the iPhone or iPad app, the commands work. It is only the Ultimate remote itself which exhibits this failure.
Does anybody else experience this? It happens every day and is starting to get annoying.