Oh indeed ! I could name you dozens of examples where I've been on the other end of the phone to Senior Professors
You obviously failed to read the orientation leaflet.
PhD student: Knows Everything
Associated Professor: Knows Everything in one narrow well defined area
Senior Professor: Knows where the Associated Professor(s) and PhD Student(s) are at any given time.
I have heard it from my dad (Senior Professor, Differential equations and Optimal Control).