What problems? You forgot to specify what they were. I have some down time to guess though, but I may or may not be around to reply again.
Last I checked the drawing canvas object doesn’t store depth, it only stores color. So pasting 3d objects results in the 3d faces drawn in an arbitrary order instead of sorted with a z buffer.
If you mean pasting stuff onto a distorted drawing canvas. I think that never worked, or worked as if the canvas wasn’t distorted. But maybe things have changed with newer updates.