Same problem here.

With the latest unitypackage downloaded from git.

I see it in other skeletons too. That's a funny bug. I'll check to see what changed between the newest and beta2 (where it was working fine).

Found the problem.
It's a simple fix. Will be fixed in the unitypackage update. Updated unitypackage should be up within the hour.

You can do it on your end by opening SkeletonJson.cs and going to these lines:
https://github.com/EsotericSoftware/spine-runtimes/blob/master/spine-csharp/src/SkeletonJson.cs#L124-L125

Then changing the last method argument from 1 to 0.