booboogaga Like topic name suggest, just found out that linked meshes refuse to pack as polygons. Can be solved by breaking the link. Not sure if this is a bug, but thought you should know 🙂
Erika Hi booboogaga, Thanks as always for notifying us about bugs, good find! I was able to reproduce it and I've opened an issue to track it here: Linked mesh child doesn't pack as polygon · #521 · EsotericSoftware/spine-editor