My left controller is no longer tracking.

I am almost certain that this is a physical connection issue inside the controller. Sometimes it will track fine for about five minutes, but as I get into a beat saber or pistol whip map, it disappears. I am a bit concerned with opening it up, but I may not have any other options since there are no replacement controllers in stock (so I'd have to buy both controllers new). Has anyone else run into a similar issue or know which connection I should look for?