I can assure you it's most definitely possible. My lux button fired when locked right out of the shipping envelope. Pressing the button isn't even necessary; locking it caused a runaway firing situation. Took the switch apart, reassembled (yes, the nut is cup-side down) and it stopped. Now it does it again sporadically. The locking ring hits a part of the thread that makes it tilt slightly, and it's enough to activate the switch. Maybe I should shoot a video as people don't seem convinced this can happen, but I assure you it does. Happens more with certain batteries than others, but they're all IMR batteries.
Perseas is sending me new switch parts when they're available and I'm not complaining (these are tight tolerances and things can get out of spec), but I want to make clear that I'm very mechanically inclined and it's not only possible for my particular switch to fire when locked, it happens quite often.
No need for a video and I am very familiar with the mechanical workings of the switches. I'm glad you are getting new parts.

