When I get the mouse over a certain robot I get a message. There is some screenshot for comprehension :
the setup :

the bug :

The save : https://www.dropbox.com/s/fhd1t77wsd95t ... g.zip?dl=0
I don't know if it's related, but my is in french, and I get some message in english.
Edit : This bug doesn't happen only when I select the robotport or an object, but it happen everytime I pass my mouse over a certain robotport, so I edit the message.