Losing internet service fully and repeatedly during same time intervals each day

Just now we lost internet service at 9:11am, 917am, 923am US ET fully.  This has occurred each day, typically in the 830am-930am and 1200pm-2pm windows each day for 3 months.  Outside of these instances, internet service/bandwidth is strong and as expected.  However, the incredibly frustrating pattern makes it impossible to work from home, schedule virtual appointments, etc.  It occurs whether there are multiple people and devices in the house and when there is one person and one device connected.  The drop is a full drop and the return typically happens automatically within 2-3 minutes.

It seems we are experiencing something similar to that documented here: https://forums.xfinity.com/conversations/your-home-network/what-would-make-my-internet-cut-out-every-day-around-the-same-time/62017406e5fd17166fe4c121

This post is among our last swings.  We have been with Comcast for 15-20 years.  We have reported this issue and had several hours long calls with support for troubleshooting.  We recently received and replaced modems and other equipment (even though what we had was reasonably new).  Comcast also sent notifications to us over the past month saying that they were aware of service issues in our area and that work was being done....each time we thought the issue might be resolved but it was not.  Comcast service person coming to house tomorrow.  If not fully fixed we are off to competitor - we can no longer tolerate this level of service, esp considering what we have paid over the last 3 months for it.

Posting this in case anyone has had similar issue that was successfully resolved.  I will relay related info to Comcast tech tomorrow.