We are sorry for the troubles! Which version of Spine and spine-unity (name of the unitypackage) are you using?

Thanks for getting back to us. Could you please send us your Spine project (the .spine file and the used images) as a zip package to contact@esotericsoftware.com? Then we can have a look at what's going wrong.

Thanks for the reproduction project, we can now reproduce the problem. We will get back to you as soon as we've gained any insights why this happens.

The issue has just been fixed, new unitypackages can be downloaded here as usual:
Spine Unity Download

Thanks for reporting!

Thanks for the kind words, glad it could be resolved quickly!