Speakers have no sound in Teams (ONLY Teams)

I have tried everything, and I have boiled the issue down to Teams. A user has been having issue when on Teams they cannot hear anyone. No matter what they do there is no sound. Thier laptop speakers work perfectly fine in 10 different applications (Google Meet, Zoom, Chrome, Firefox...) Teams is the ONLY application that can't seem to use the speakers. I have tried reinstalling the audio driver from both Dell and form the manufacture with no change. I have tried removing all other sound devices then it, same issue. I have tried making it the default communication device, same issue. I have tried using headphones plugged into the 3.5mm jack, same issue. The only thing I can boil it down to is Teams. I have no idea what Teams does to audio, but this is not the first time it's been a Teams issue. I have a pair of Jaybird Vista Bluetooth headphones, and they cause teams to bluescreen. Been using them for 3+ years no issues on 3 different laptops. We move to Teams, bluescreens every day. Stop using them low and behold the bluescreens stop happening. Call MS support and I get told to use another pair there is obviously something wrong with mine (the pair that has been working perfect for 3+ years) I also tried them on a new machine, same issue, blue screen.

Any ideas of what to check next for this audio issue? Users can't do any meetings because they can't hear anyone. They have to use their phone to join meetings with audio which is really annoying for the user.