Hello, I've come across a bad behaviour when working with constraints:
I have a chain of 2 bones that use an IK-constraint. During the animation cycle, I move and scale the parent bone. So far, everything works. Animating an unproportional change in scale for the first bone of the chain makes the bone jump at the transition from the first to the second frame and from the second-to-last to the last, regardless of the transition curve.
If the scale change is proportional, this does not seem to appear. However, the numbers shown for scale are in any case confusing if not faulty, seemingly reflecting the scaling of the parent bone but reverting to the local scale when being clicked in order to put in a numeric value. Especially the second number behaves oddly: Entering i.e. a 0.9 and pressing enter, then clicking again, it's not 0.9 but other values, seemingly random and/or kind of depending on the first number.
PS: The IK is smooth, but it also happens if it is not.