I've tried to reproduce this for over an hour now in A21 B324. The only thing that comes close is the demo @NekoPawtato posted, but I don't think that is the case since @AmethystLainey was only level 2 when they died to the snake. I even tried the suggestion by @Elidey without any luck.
If anyone can find 100% repro steps, we'd love to see it.