Internet connection drops every 20 minutes and 30 seconds.

For the last two weeks my internet connection drops every 20 minutes and 30 seconds for about 10 seconds.

I have had one visit where technician replaced line in backyard with no change.

I have a constant ping to first hop out and it runs clean but then I lose 5 to 15 replies exactly 20 min. and 30 sec. apart.

I have removed every outer device, cable comes in house directly to xfinity device, no splitters. My laptop is connected to xfinity via Ethernet.

If im on a teams call during outage all voice and video stops for about 15 seconds.