OKAY. It seems I have found out how to make this damned bug to reappear.
It has something to do with mapchange: If the map changes, the playertype breaks
EDIT: HOLY stuff I fixed it! Thanks to Xalos, It's fixed. Uploading new version!
Changelog:- Added new RTB preferences! (This means you can turn off stamina.)
- Fixed a bug of playertype not working after a mapchange/gamemode switch/whatever it was
Little heads up, turning off stamina will still leave jump energy drain and run energy drain run in background. It will be fixed in new version. Parkour features won't have any stamina, if it wasn't clear.