Cub Cadet LT1045 deck belt jumps off on lowest setting

model 13AX11CH712
Deck belt jumps off on lowest setting. All the pulleys seem to be ok. I did notice the belt runs high on the tension pulley. Anyone out there in Cub land have any issues with this model.
Thanks for any help

Cub Cadet LT1045 deck belt jumps off on lowest setting