Using Skinning editor tools on multiple layers simultaneously doesn't seem to work

Currently when I select multiple layers in an imported PSB in Skinning editor and click on "Auto-geometry"->"Generate for selected", this doesn't generate geometry for all the layers I have selected, only one of them.

Same with "Weights"->"Weight Slider" - when I select multiple layers and adjust weight, this doesn't adjust the selected bone weight on all the layers I have selected.

EXPECTED BEHAVIOUR:
When I adjust weight or generate geometry, I would expect that all the layers I have selected in the Visibility->Sprites -panel are affected.

CURRENT BEHAVIOR:
Only one of the layers is affected (probably first or last selected).