“Can Jump” doesn’t update in an appropriate manner in 4.13.
In 4.12 it would return true while grounded, false while in the air, and then back to true when grounded.
In 4.13 it stays true unless you hit your jump input while in the air, then it changes to false and stays false even when grounded. Then hitting your jump input while grounded changes it to true and stays true until you hit jump again in the air, as mentioned.