Thanks, I could confirm the issue in spine-flutter. I have fixed this in the 4.1 and 4.2-beta branches of the spine-runtimes repository.
I have also released spine-flutter 4.1.13 to pub.dev. Please note that the 4.2 package is currently none functional as we are updating spine-cpp (the underlying code of spine-flutter) to be compatible with our new physics feature. Please watch the spine-runtimes repository or pub.dev for the next 4.2 package release which will be fully functional and compatible with Spine Editor version 4.2
