I think in this case is related to event inputs that are of type custom BP and get an array from it, anyway, if you try to delete the bad working nodes and variables to try to restore it you are dead because it will start breaking in other nodes randomly and finally it will crash the editor when you try to open any damaged BP
Also, finaly I got an error on the node “get player pawn” that said to contact the framework team because they need to know that bug, this means that is a big internal problem, why? I dont know because deleting it and adding it again it works (for sure, next time I restart the engine it becomes broken again)
I dont like to jump to c++, Im not very familiar with it and would be difficult to port all I did in BPs :S
Thanks for your reply!