Recurring Intermittent service outage every afternoon from 12 to 4pm

I need to report a recurring intermittent service outage that has not been resolved after three technician visits. My XBB gateway loses its connection to the Xfinity network every afternoon. Internet, TV and voice all stop working, while the Wi-Fi network itself remains visible and devices show " Connected without internet". The XBB repeatedly cycles through flashing yellow to green and white lights.

I have documented the outages by time and this has been happening repeatedly every afternoon. Three technicians have come out and still the issue persists.