Came on here to say that for me at least, this was definitely a hardware and not a software issue.
I thought that the right bud was somehow totally disabled. Tried to reset, repair, and run down the battery to reset, none of which worked. After reading this thread, I checked and realized that no, the right bud was not silent, it was just very very quiet.
I used a pair of electronics tweezers and removed the gold foil. I removed the black cloth strip underneath, and now the right bud has full volume. I put the gold foil back in place. Hopefully it doesn’t fall out inside my ear.