Hello!
The issue with whitespace stripping for sequence meshes was identified as a bug and was supposed to be fixed in version 4.1.17. However, if you are still experiencing this issue in version 4.2, it might be due to specific conditions or settings in your project. It's important to ensure that your images are prepared correctly, possibly by manually stripping whitespace before importing them into Spine. Additionally, make sure that your Spine and runtime versions are up to date, as this can sometimes resolve unexpected behavior.