Hi! Sorry for the late response. I'm a full-time student in a non-CS field, so staying on top of programming stuff is difficult.
I can't say that I've encountered this bug myself in my two playthroughs. Could you let me know what browser + OS you're using, or if you've noticed that it happens often on a specific level?
I have a couple of inklings about what might be happening behind the scenes, and I have a pretty good idea of what I can do to put in a fix sometime in the next couple of weeks once school is over for the year. Will comment again then, and thanks for your patience!