@RonTheRed Follow-up. I have a work around. The 3.11.6.1 firmware for the Giga Hub rolled out, evidently, from 1 May to 5 May. I went to bed on the night of 4 May, and in the morning of 5 May, PPPoE...

I have a Bell Giga Hub, firmware 3.11.6.1, and an Archer AX20(CA) v2. I configured the AX20 to use PPPoE to get the IP address from Bell, and this system worked perfectly (for six months) until...