Performing hardware diagnostic on Nighthawk RAX50

Not sure how to answer all of the questions.

1. Modem is a Spectrum supplied cable modem

2. V1.0.16.132_2.0.92; router is set to update automatically.

3. 300 Mbps

4-6. Not sure how to find that information. Recent speed test showed 374.60 download; 11.85 upload; 15ms ping. Test completed using Nighthawk app (SPEEDTEST powered).

7. Home computer is hardwired to the router. All other devices (televisions, phones - iPhone 11 and 14 - and induction stove - IoT) are wireless.

8. Slow and intermittent most common when streaming movies or shows on TV (with only one TV on). We see this probably every few weeks, and when it occurs, the annoying buffering gizmo appears as often as every 5-7 minutes. This seems to go away if I cycle power (minimum 30 seconds) to modem and router, or just the router. The signal strength indicator on our phones also shows less than 3 bars at the same time we see the buffering issue on the TV. Not sure this is an internet drop out, but occasionally (typically when signal strength drops), the picture on the TV will freeze without also showing the buffering gizmo. When the TV recovers, it picks up where the show is in progress (we miss what was happening at the time the picture froze). During the buffering, the show resumes where the buffering started, after which, the picture is often very low resolution (even though we have 4k service through YouTubeTV, which, of course depends entirely on how strong the wireless signal is at the time).