I noticed PlayCanvas does not rly support having multiple deform armatures on the same mesh (aka. blending the effect of the different armatures). It seems that it chooses the first armature to be the working one, and the second just doesn’t manage to deform the mesh at all.
This might seem oddly specific, but I just bumped into a case where this would be rly useful, so if it is not too difficult to add support for this it would be great.
I made a new project illustrating this here.
It has 4 different variations of an icosphere that is bound to 2 different deform armatures. This works very well in Blender, where the effect of the 2 different armatures are blended. However in PlayCanvas only the effect of one of the armatures are playing. I tried 4 different set-ups but could not get any to work.
The intended result (from Blender) would be something like this: