The code for selecting bones from a pose was still using the legacy api, thus it didn't work properly for selecting bones of all slots. Pull Request: https://projects.blender.org/blender/blender/pulls/134912
The code for selecting bones from a pose was still using the legacy api, thus it didn't work properly for selecting bones of all slots. Pull Request: https://projects.blender.org/blender/blender/pulls/134912