Lery´s Memorial Institute body couldn´t be picked from the ground.
I was playing Twins against a console SWF. The Claudette reached this corner after being downed. I couldn´t pick her, I lost alot of time and wasn´t able to get my gen regression with Pain Ressonance, I lost the game.

Comments
Sometimes it does happen when a survivor's body clips into environment they can't be picked up.
Survivors know this and 'could' move to be hooked but using this minor bug prevented you from using your perk.
Kudos on playing Twins too.
Submit a bug report
There is also a spot near a hedge line in badham that survivors can crawl into making it impossible to pick up
And one on the game, below some stairs....