Stunner - Invalid commands can be executed by some of the toolbox's buttons

Some invalid commands are being executed when firing some toolbox actions.

I can reproduce it by creating a new node using as source another node which is inside an embedded subprocess, but the source node's location is near the right bounds of the parent subprocess. In this case, the new node is being created outside the embedded subprocess, so it's parent is not the subprocess one. Due to sequence flow restrictions with the embedded subprocess, the new generated node is not passing the validations, but it's created anyway, and should not!

See attached video for better understanding of the above example.