Relatively consistent T3 timeouts requiring modem restart
I've been having this problem where my modem (Netgear CM1100) has too many T3 timeouts and requires a power cycle in order to reestablish internet connectivity. This has been happening every couple days (usually 2 times a week on any day of the week). The weird part is that it only has happened from 11am to 1pm CST (I live in Texas).
This normally wouldn't be an issue because a single power cycle fixes the issue, but I do livestreaming for my church during that 11am-1pm time frame, and I have had issues maintaining my livestream. While livestreaming, sometimes my upload speeds hit zero or <1mbps (I'm usually uploading at 3mbps with a ~6mbps internet upload plan), but the speeds recover after 10 seconds or so (kind of off-and-on). However, when the T3 timeouts keep happening and my modem locks up (as in I can't load http://192.168.100.1/ anymore), then I have to completely pause the livestream and power cycle my modem to reestablish my connection.
I encountered this 11am-1pm issue with two of my older modems, which led me to buy the CM1100 in hopes that it would fix the problem (Narrator: it didn't). I was using a Netgear CM400 when I moved to my current house back in July 2020 (an Xfinity tech came to hook up the cable from the street), and I didn't have this 11am-1pm T3 timeout issue. I don't remember the timeline too well, but I think this issue began happening around Fall 2020, then disappeared Winter 2020, and then reappears in Spring 2021. I remember when I encountered the issue in Fall 2020, I hooked up my CM400 modem directly to the coax cable entry point in the house's wall panel (also tested with an even older Arris SB6121). However, this did not fix the issue. But as I said earlier, the 11am-1pm issue went again for a couple months before coming back in Spring 2021.
Throughout this whole time, I've been monitoring my modem's cable connection stats, and they've (all 3 modems I've tried) been in normal ranges. I can post a screenshot of the stats from my CM1100. I can't really think of why this issue seems to occurs on random days but always in the same timeframe around lunch time. I'm hesitant to make an Xfinity tech come look because it's likely that nothing will look wrong during the visit + a single power cycle has always fixed the problem.