XG1v4-A Outputs Sound as Stereo but in a 5.1 Wrapper.

I recently moved and received a new XG1v4-A main DVR box, but quickly noticed the same issue from all of the threads listed below still exists years later, and I have not found a thread that has a solution.

Basically the Apps on the Xfinity box, like Amazon Prime Video and Paramount+ only send the Left and Right channels out the HDMI port to the receiver/tv, but "wrapped" in a 5.1 format. In My case it is a Denon receiver that clear states it is receiving a 5.1 signal. To say another way, all 6 channels are sent to the receiver so the receive thinks it is getting a 5.1 signal, but in reality, all of the channels are silent except the front left and right. Preventing the receiver from recognizing that this is only a stereo signal and preventing the receiver from being able to process the signal itself to 5.1. 

My understanding from other threads, and my previous equipment, when the X1 box is set to "Expert" audio mode it should pass the audio straight through without modification, but this is clearly NOT happening. Old sources that were not recorded in 5.1, or even were mono are being sent out of the X1 box as 5.1 with most of the channels silent, when in Expert mode. DD+ mode  on the X1 box does the same.

Is this truly still an issue, other than giving up 4K and attempting to downgrade to the XG1v3?

I already tried using the HDMI cable that came from Xfinity, and also a System Refresh. There appears to not yet be an update to fix this.

Here are several threads on this forum that exactly describe the issue that I am seeing:

https://forums.xfinity.com/conversations/x1/xg1v4-box-dolby-processing-problems/61e914942aa9b452b914103c
https://forums.xfinity.com/conversations/x1/no-51-on-some-apps/62b9fa0a26e4b32f2deb3ed8
https://forums.xfinity.com/conversations/x1/audio-processing-on-xg1v4/6348c0a048c60d55e605f552
https://forums.xfinity.com/conversations/x1/why-is-xfinity-x1-xg1v4-still-not-processing-dolby-digital-surround-correctly/6286e936382dc22d0f76a2a3
https://forums.xfinity.com/conversations/x1/audio-auto-detect-vs-expert/645934695f43f561c4d1b9d7
https://forums.xfinity.com/conversations/x1/dolby-atmos-on-streaming-apps-netflix-disney/620437c0de95f94896eb2324