Kiste Molt Bug

[slagpot]

On the grineer mobile defense mission in Kiste, I have noticed in a few games that when I cast molt on top of the warframe or the train and cause any nearby Grineer to target it, all grineer will suddenly fall through the floor of the train. Subsequently, all Grineer will approach the warframe as if it wasn't there and simply fall through the train repeatedly, being reset on to the edge of the platform.

 

I've noticed this happen in the past to me and not the Grineer, when occasionally I couldn't stand on the train and if I fell through it I would be reset onto the platform. I believe this is somehow related, but I'm not sure how.