I believe I've actually had this happen with actual VLC, I think I just hit pause and then play and it was fixed. So maybe pause it for half a second after your seek.
Did not work. Thank you for the suggestion, though!
Good news is, for this project, I just learned I can avoid having to do this, so.. at least that's something.
Okay, I actually do need to seek. However, something about going out over bluetooth instead of over the headphone jack has made it work, so.. no idea, but there you go. (Or maybe it's something else that I did, but, either way, it's working, so.. cool.)