if you want to paste something offscreen that isn't drawn when offscreen in that plugin then you have to do something tricky such as make the game canvas the same size as the layout for a tick before pasting.
For layer effects you'll want to just paste all the relevant objects on that layer to a seperate paster object first and apply the effects and blend mode to that.
The canvas object will crash when pasting certain objects when webgl is on because those plugin's don't do anything to make the non webgl version work when webgl is available.
Maybe that can help? You may need to adjust your game or come up with a creative solution to work around it. The paster plugin itself is basically final and meant for simpler things it does well.