Post a console.log without trace.
Disable player persistance if it's enabled.
Search help going back ~10 pages, somone had a crashing problem when they died of fall damage. See if your symptoms are the same, and if the solution from there works.
Disabling player persistence fixed the mid-air spawning problem.
I also have marble man's corpse script enabled, which he claims to have fixed , but when I enabled persistence and disabled corpses, I died and didnt crash.
Also, i've found the mid-air spawn only happens the first time you spawn in the server.