Make the 'Available' keying set look at the F-Curves for the assigned slot, instead of the backward-compatible API (which only sees the F-Curves for the first slot). Pull Request: https://projects.blender.org/blender/blender/pulls/137131
Make the 'Available' keying set look at the F-Curves for the assigned slot, instead of the backward-compatible API (which only sees the F-Curves for the first slot). Pull Request: https://projects.blender.org/blender/blender/pulls/137131