Pixelation X1 tv services, Loss of High speed internet

Around Oct 20 2024 we have experienced a) pixelation on Xfinity X1 tv service and b) Xfinity Internet service dropping back from Hi-speed internet to (all yellow) internet coverage.  This has occurred prior to today mostly in 5pm-8pm window, but today has occurred all day.

Symptoms are as follows:

a) pixelation on Xfinity x1 tv channels, had started in previous week, with pixellation of bottom 1/4 or bottom 1/2 screen.  As of today it covers entire screen on multiple channels we are using.

It does not appear to have time of day issues at present time.

b) cable modem drops from hi-speed internet (blue transmit) on Arris cable modem back to normal speed internet (all yelllow lights), then goes back to hi-speed.  This is a nagging issue but is not the main service issue like a) above.

c) When streaming on Roku/Amazon Prime, knocks you out of show and sends back to Roku menu

Troubleshooting and results as follows:

1) restart (by power cycle) the box showing the most pixelation.  Did not resolve issue.

2) restart (by power cycle) the main (we have 2) cable boxes on our account (the ones that handle all of the 5 subsidiary cable boxes).  I believe these are called the primary boxes.  Then I restarted (power cycle) the related smaller boxes.  This dramatically improved all pixelation so now tv service is watchable.  I will monitor.

If could respond on signal strength and other issues to resolve pixellation on more permanent basis.

Thank You.