I'm experiencing this same "bug" a lot also- I've played hours of the original Pac games on actual arcade machines and hardware and I'll admit I do think the likelihood of this bug happening is higher in your Rewritten version. Sometimes when approaching vulnerable ghosts head-on in otherwise long, straight corridors I pass right through them even though we're not turning into each other.
I really appreciate your focus on accuracy otherwise though, I just feel like that recreated bug is either a little too "sensitive" or maybe a toggle to disable it would be useful.