Hello,

I'm with Spine 3.8.72 on Win10.

I have a spine. Let's say I want to make the process to have a bigger spine at the end. Because my images have become bigger (in dimensions). So I want my spine to get bigger as well.

There no images in my example, I don't need it. I just create one simple IK, which is animated, and I change also the positive/negative property.
The setup:

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So I export my old spine in a json:

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Then I import this json:

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The new spine with the broken IK, if I play the animation:

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But I found how to fix it. I just need to untick then tick again this property:

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If it might help you fix it in the code.

Thanks a lot!