I seem to have run into an issue with this map.
It runs fine, FPS is not crazy.
When I walk I can go up and down stairs no issue. But when I jump I float and don't come back down.
I get the same issue in TDM 2.03, 2.04, 2.05 and 2.06, so it doesn't seem to be mod specific. It's something to do with the map.
Can someone try it for themselves?