Two days ago I made 6 short field landings using a technique of going to full reverse upon touchdown using a joystick throttle and when speed on the runway reduced to taxi speed I advanced the throttle to flight idle, let the engines stabilize and then retarded the throttles to ground idle.  On 5 out of 6 landings I was able to keep all the engines running with this technique.  Yesterday I did a series of 5 short field landings using the same technique.  On 3 of the landings all the engines shut down, on one the #4 engine shut down, the others  kept running, and only one landing had all 4 engines running after my technique.  Thought I had a work-around to the glitch, but it wasn't to be.