When you switch from (Object, Object) to (Object) where you have a message Object and context Unity Object set, it will break all the noodles. This isn't a critical bug as you can CTRL+Z to undo and then manually delete the noodle connecting to context Unity Object to prevent it from breaking all your noodles. Also, the console shows an error the following error:

ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index