Volume fluctuation on Xfinity cable box.

I'm having the exact issue as member thebeans66 posted on Nov 16, 2021. It started with streaming X1 box, so I thinking it was the box I returned it and got another box from the Xfinity store. Still had the volume problem. So I then got a new 4k DVR cable box, and I still have the same issue.

Quoting from "thebeans66" post: since installing the new X1 box I have inconsistent volume.  Most channels are fine most of the time.  But some channels are way lower volume and some will be way louder.  Also commercials frequently have low volume.  I will be watching a show and the volume is fine and as soon as a commercial comes on, the volume will drop to super low.  Then sometimes the next commercial will also be low or sometimes it will be normal volume.  The volume never changes in the middle of a show or in the middle of a commercial.  It is always just as a commercial starts or ends.  Most times a channel that has  volume different than most will be lower than most of the others but sometimes I'll be changing channels and a channel will have way louder volume than the others. End quote.

A service technician was here on April 14. And could not fix the problem and blamed it on the box firmware and he would notify his supervisor the resolve the problem. 

I haven't heard anything and still have volume problems. 

Can someone help?

Thanks