RPD exploit

I recently played a game on rpd where the survivors used an exploit on the map to make it so they physically couldn't be hooked. first they had a guy with no miter, then him and a few other survivors would run to the top of the library when chased and once they were at the top where there was no dropdowns, they'd let themselves be downed. because they were so high and they brought an offering to spread out hooks, if I picked them up to bring them to a hook I physically couldn't ever make it in time before they wiggled off and went right back up. so I thought ok ill slug them and kill them that way. Nope because of no miter they could sit up there forever and heal themselves and repeat the process. This held the game captive and made it so there was no physical way to beat them. Please fix this, I thought rpd was supposed to finally be playable but I can see that was a mistake.