Szania I'm sorry the Spinebot response wasn't helpful. I removed it because it may have caused confusion.
Could you let us know which version of the Spine Editor you're using? Based on your description, the issue may be caused by a bug related to curves. However, if you're using an older version, it could be a problem that has already been fixed in a more recent release. Knowing your editor version will help us determine this.
Additionally, it should be possible to confirm the issue by observing only the bone's movement, without any images. If possible, could you share a video showing only the problematic bone so we can clearly see the behavior?
