I mostly work with animation loops and a lot of times I offset keys so I can do some follow through and overlapping.

The problem is that since a recent update (I can't recall which one exactly) a bug appeared where the first or the last key of the animation (depends on the direction you offset it) loses its curve and becomes linear. This of course ends up making the animation look weird.

This is especially problematic in cases where the curve is split between the start and the end of the animation and one half becomes linear. It's hard to make that half of the curve by hand without looking weird.

badlogic ha scritto

Could you provide us with a step by step description on how to reproduce this?

It's fairly easy. Just put three or more keyframes (none of them with linear curve beforehand) and move them around with the offset option on. It happens with both selecting the keyframes by bounding box or moving them with the shift option (it happens more consistently when using shift). At least one of the curves is bound to turn back to linear.

I also just found out that if you do the same with two keyframes, one of them ends up losing its values and you end up with three identical keyframes (that is, no animation at all).