Mini loses connection repeatedly

Recently, our Mini started repeatedly losing connection to our Roamio. Usually when watching live TV, (but sometimes during streaming a recording), it will fail with 'Lost Connection - V87'. This sometimes corresponds to a 'C133 - Temporary Service Connection failure' error on the main menu. When this happens, simply hitting 'OK' and going back to Live TV works.

This happens as often as every 30 seconds or so, which makes it pretty unusable. But streaming Netflix, etc. works fine.

Both...

Mini loses connection repeatedly

Mini loses connection repeatedly