We love it!
Sometimes it will do what you’re mentioning, and my roommate,who does big time IT support for electrical co-ops, swears it’s the wireless modem. With the old service from Att the modem was handling it, but just barely.
As usual YMMV
Sounds like this may just be normal for ATT’s fiber internet. I don’t know how some of you guys can stand it. If the new modem doesn’t resolve it, back to Comcast it is. Not gonna spend more time on this.