I installed the trial version to see if there were any new options there to solve my problem, but it still persists.
I have imported the spine file for you so that you can analyze it. When animating the sword is deformed and some parts too, the girl's neck sometimes protrudes.
Is it the weight?
I have used Blender and have had some problems similar to this one. Just leveling the weights was solved with other 3d animations, but in Spine, leveling the weights doesn't change those warps.
I hope you can help me and explain what to do. Pls