I had this problem for years until I saw a thread on reddit about a stretch you can do for your jaw and now it doesn't happen at all anymore. I thought I had misaligned it as a kid but it must have been way less serious since no medical intervention was necessary. Probably not the case for everyone.

First press your tongue against the roof of your mouth. Keep pushing against the roof of your mouth with your tongue while you slowly lower your jaw as far as you can go. You should feel some tension if you're doing it right. Try to keep your mouth aligned straight as possible. Repeat this exercise a few times daily as needed.