Yuutu engine weird bug

[PanKarmelek]

Hey guys, I got a little problem when making fangames in yutuu engine. Sometimes, randomly when doing a 1-frame jump the character is set flying, like, he just jumps very high. Is this a known bug and do you think there's a way to fix it?
If not I could probably switch to other engine but I'd have to move my rooms and tiles there, is this possible?
Thanks for help! 

[Habluka]

Yuuutu added an else in part of the player's step event where it shouldn't belong in a recentish update.  Just take it out and it should work.

[PanKarmelek]

It seems to be working now, thank you very much!