When reporting a bug, please follow the template provided, otherwise the report will be declined. The information requested is vital to allow us to correctly reproduce and then fix what you are reporting.
Can't Pick Up Downed Survivors in Basement
I was playing Deathslinger on Sanctum of Wrath and I downed a Laurie on the flat platform of the basement stairs. After I downed her, I could not pick her up at all. Basement spawned at the Killer Shack. My build was the Snake Oil (Brown) and Tin Oil Can (Green) Add-Ons, with my perks being Level 2 Knock Out, Level 3 Infectious Fright, Level 2 Mindbreaker, and Level 3 Discordance. I also ran a bloodpoint offering.
At first the Laurie was downed on the corner of the thin L-shaped wall towards the basement hooks, but she was eventually picked up and downed again only a small distance away, facing a flat wall, still on the platform. Neither down allowed me to pick her up.
Potentially this was a case of exploits used by a salty player, in which case their username was something like DarthBates12 (unfortunately I didn't catch it). However, I've had this problem before with other killers with different builds, which leads me to believe it was a bug and not an exploit.