phtcloud Thank you for sending the video. After organizing and checking the Spine project, it appears that this is the same issue you reported previously, which is a problem with the order of the constraints. Reversing the order of the constraints body_mouth and body10 will produce the same result as in 4.2.
After simplifying the skeleton to a certain extent, I was able to get the correct order using the Sort button, but with the Spine project you sent me as is, the Sort button did not work, and I was unable to arrange the constraints in the correct order. I have added a link to this thread and the issue to the issue ticket I created earlier:
EsotericSoftware/spine-editor918
