Xbox Elite Series 2 - Disconnects and Warranty incorrect

First off, is there no form to email Xbox Support? Seems like my only option was to chat with a virtual assistant that was no more helpful than Google.

In an attempt to find a way to contact Microsoft about my issues I did find that I could register my Elite Series 2 controller to check its warranty status. I received the controller as a gift for Christmas 2019 (the controller was purchased in December
2019). When I registered it I was only asked for the serial number, no proof of purchase or anything like that. Once I entered the SN it shows that the warranty is only valid till 5/5/20. How do I correct the warranty to be 1 year from the date of purchase?

Finally on to the real issue. I am a very casual gamer, with work and family I only get an hour or two a night for 2-4 nights a week to play. I asked for the Elite Series 2 controller because it seemed like a very solid controller. But usually 2-3 times
a gaming session the controller will completely cut out for 3-4 seconds. It never loses power, just disconnects and immediately reconnects. As a FPS player this has gotten my character eliminated more than once. I also game with a pair of headphones plugged
into the 3.5mm jack and usually a sign that its going to cut out is when the audio starts to stutter.

My Xbox One X is less than 10ft away with clear line of sight on a shelf all to itself in my entertainment set it also gets direct and active cooling. Some basic steps I have tried:

Restart Xbox One X (by pressing an holding the Xbox Button on the console)

Power cycling the controller

Making sure the controller is charged (batteries in the Elite Series 2 are NOT user replaceable)

Turning off Bluetooth on my cellphone (did this as a test, but controller still dropped out)

Updated controller's firmware

Sat closer to Xbox (though I should be able to game without issue at 10-20 ft anyways)

While my son sleeps I will usually watch TV/Movie/Youtube on the Xbox with my stereo receiver off and just listen via the headphones connected to the controller. I have NEVER had the controller disconnect or have any audio stuttering. It only seems to happen
when I play CoD Modern Warfare (which is the only game I play at the moment, so it could be games in general, or maybe just CoD). Apps I use to watch content are OneGuide, Plex and Youtube. I can be watching a TV show for an hour without issue and immediately
switch to CoD and I can notice some audio stuttering.

This issue has been happening since the day I received the controller but I was just hoping it was a software issue that would get fixed. I switched from an Xbox One controller with BT/Headphone jack. I never had a controller drop out on me (unless the batteries
died). Why does this wildly more expensive controller work so much worse than the basic one I was using before?!

:)