I'm having a problem with some of my animations. My main character is an ape climbing a building. On frame 1 of the animation, the left leg gets distorted (see image). Not sure why this is happening, I did not design it this way. As an easy fix, in the Timeline, when I click the button "jump to first frame in frame range," it always fixes the problem and the leg returns to the correct position as I designed it. However, when I export the model and armature as FBX and import into Unity, this glitch appears in Unity on the first frame of the animation.
Any advice on how to fix this would be greatly appreciated.