i3ursucu The SkeletonMecanim does not properly handle animation state's normalizedTime when it goes negative. The animation freezes on the first animation frame. This behavior can be viewed on this video: And can be tested on the attached test project.
Harald Thanks very much for reporting and for the clear reproduction package! We have fixed the issue, a new 3.8 unitypackage can be downloaded here as usual: Spine Unity Download: Download Issue ticket for reference purposes: https://github.com/EsotericSoftware/spine-runtimes/issues/1790
i3ursucu Sorry for the late reply. The fix for this bug added a regression. Please test again the provided scene with the fix and change the Animator's "New State" Speed value (not the Multiplier) to a negative value (i.e. -1). The animation should go backwards with a positive multiplier (change-able from the Game View) and forwards for negative multiplier. I have created a follow-up issue: https://github.com/EsotericSoftware/spine-runtimes/issues/1810
Harald Thanks for reporting and sorry for the troubles! We will let you know once the issue is fixed. A bugfix has just been released. A new 3.8 spine-unity unitypackage can be downloaded here as usual: Spine Unity Download Thanks again for reporting!