Jumping is not as fluid as it was pre-0.43.0
OpenMW has a jump cooldown - a period of time after landing where you can not jump again - which is not present in Vanilla.
OpenMW 0.43.0 - d2b3f90 (current head as of now)
#1 Updated by Alexei Dobrohotov about 2 months ago
- Subject changed from Jump Cooldown should not exist to Jumping is not as fluid as in the previous versions
Huh. It's something introduced during 0.43.0 development, there's no such issue in 0.42.0.
It appears that the player can't jump again while landing animation is not finished.
Probably introduced in pull request 1529, but a bisect may be needed regardless.