I’ve always noticed some strange behaviour with the Animation Editor. But i only realised it now. So in edit mode, you make your animation and you use different Easing Styles and Directions. This is what i did with mine:
The Easing Directions seem to be reversed between Edit Mode and playtesting. I tried this using the Roblox Player(RobloxPlayerBeta) and the animation is different than the one i edited in Studio.
If you want, you can see the problem for yourself here: anime.rbxl (23.8 KB)
This only seems to be the case with Animations. I havent had a problem with TweenService yet.
Hey @20amir02, we are aware of this issue! It stems from the animation editor using TweenService for easing, and the internal animation playback using its own easing functions (which happen to have the reverse effect)
This issue is still persisting. And I’d also like to add that this only applies to the Cubic easing style.
Other styles such as Bounce are not affected by this reversing issue.
I don’t know if it has a connection but cubic/exponential tweens doesn’t seems to work with :TweenPosition() on ui’s. Does the exponential tweening style work for you?
these broken features should be documented it’s not fun to deal with these ones where they behave one way in the editor and another when run in-game because it leads to the assumption that something your game is doing has caused it
If KeyframeSequences are deprecated please mark them as such!
it’s not fun to deal with these ones where they behave one way in the editor and another when run in-game because it leads to the assumption that something your game is doing has caused it 
