Tivo Mini stutters for 1 hr same time everyday

I have a Tivo Roamio (6 tuner) and 2 Minis connected via MoCa. Typically, only one Mini is in use at this time. Everyday, at around 11:00am, the Mini starts stuttering for about an hour. By noon, it works as expected. The hosting Roamio does not stutter, so I am assuming my inbound cable signal is sufficient.

• All Minis and Roamio are on the latest update.
• There is not any additional load on the Roamio during this time (no recordings occuring, system/programming downloads).
• There is not anything else running on the MoCa network (no additional cable boxes, etc.)
• The cable network is relatively clean - a 4-way splitter coming in to the house behind the POE filter. I did install a signal booster to the one room with the Mini, but that has not impacted the stuttering one way or the other.

Ideas?