Why do bones keep repositioning when I animate?

[davidonionball]

I have rigged a character's legs using the bone tool, but when I move the legs it moved the entire bone structure. I have no idea why it's doing this, am I doing something wrong? What can I do to make sure this stays consistent throughout the animation?

Here's a GIF of what's happening:

[Nicktendo28 · Accepted solution]

I found to fix this issue, by saving my work and restart Adobe Animate.