Many issues since 20.6.1a upgrade

Since the upgrade to version 20.6.1a RC10-USA-6-848 I have had many issues . Roamio plus rebooting every 5 mins. or so while it is connected to the network. Happens whether I use Ethernet , Moca or wireless. Am able to watch live or recorded shows until it reboots. If I disconnect it from the network there are no reboots. Had no issues until this upgrade. I have two Premiere's a Premiere 4 and a Premier 2 that won't connect to the TiVo service , again there were no issues before the upgrade. The problem is not with my Network as I also have a Roamio Basic and a Tivo3 that connect just fine. I haven't seen too many post's on this rebooting issue. Searching for a resolution