Electric locks return voltage spikes on their power wires and also emit microwave radiation when switched. Note that Magnalocks include internal electronics which suppress both inductive kickback and radiation.
First, check the access control equipment it may be faulty or have been installed improperly.
Second, a problem can arise with the Magnalock. If the Senstat version is being used, the strike plate (which passes current) must be isolated from a metal door and frame. Securitron supplies insulating hardware to accomplish this but the hardware might not have been used or the strike may be scraping against the header for instance. Check for full isolation between the strike and the door frame (when the door is secured) with an Ohmmeter. The presence of lock voltage potential in the door frame can interfere with the ground reference of access control system data communication and therefore cause a problem.