Sorry for the late reply, keep forgetting to check in here. I take it you were playing on a real AES? If so, it's a known issue which I haven't managed to find / resolve yet.
Yes, I was playing on a real AES. Does this bug happen on the MVS as well? Thank you for replying. If you'd like, I could be a 'beta tester' for your ports—I'm good at finding bugs, haha!