Hi, I found that if I check on/off Inherit (Scale/Rotation inherit) on any animation, then it gets bugged on Unity, even in the Animations Preview.
Once I play the animation with inherit keyframes on it, the next animations that I play get the inherit keyframe override, no matter if these animations have or not inherit keyframes.

I'm using Spine v4.2.32
Sorry if I didn't explained it well, my english it's not good.

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It seems like you are encountering an issue with the inheritance of scale and rotation keyframes in Unity when using Spine animations. This problem might be related to a version mismatch or a bug in the spine-unity runtime.

Here are a few steps you can take to troubleshoot and potentially resolve the issue:

  1. Check Versions: Ensure that you are using the latest versions of both the Spine editor and the spine-unity runtime. Version mismatches can often cause unexpected behavior.

    • You can find the version of the spine-unity runtime in Assets/Spine/version.txt or in the Unity Package Manager.

  2. Disable Animation Clean Up: When exporting your Spine animations, make sure that the Animation clean up option is disabled. This has been known to cause issues with keyframes in Unity.

    • This can be done in the export settings window in the Spine editor.

  3. Key Transform Inheritance: In Spine 4.2, you can now key transform inheritance for bones. Ensure that you are correctly setting these keys and that they are not being unintentionally overridden.

    • If you are not using this feature, it should work as before, so double-check your keyframes and inheritance settings.

  4. SkeletonUtilityBone Hierarchy: If you are using a SkeletonUtilityBone hierarchy in Unity, be aware that Unity does not support disabling inheritance of scale or rotation in the Transform hierarchy. This could be causing the issue.

    • Avoid using SkeletonUtilityBone in Override mode if possible.

  5. Preview in Unity: Check if the animations look correct in the Preview section of the Inspector window in Unity. If they do not, there might be an issue with the export from Spine.

    • If the problem persists, consider sending your Spine project to Esoteric Software for further investigation.

If these steps do not resolve the issue, it might be a bug that needs to be addressed by the Spine development team. You can follow the issue on their GitHub page: Spine Editor Issue #725.

I hope this helps you resolve the issue with inheritance keyframes in Unity.