Which version of the game are you on?
I was able to reproduce this on 0.15 (I think that's what I have, heh) by doing this:
1. Start grappling a female native with the R key.
2. Hit ESC to pause the game.
3. Continue clicking the left mouse button.
Result: the animation is paused but the NPC's white bar continues to drop until it's completely empty.
You have to unpause to get the H scene though.
So if this is still happening in the latest version, it means it's a pretty old bug that the dev might not know about.
Nice catch!
Oh, and thanks for not being a stevenfire about it by the way