My kholster never had that problem and I used it for a year daily, but my Comfort Carry did (Both are like IWB hybrid leather/kydex setups like the MTAC or Crossbreed supertuck)
Problem was easily fixed with a hair dryer and a spoon in 2 minutes
DIAGNOSES:
Problem was caused by that indentation for the take down lever/activation on/off lever on
the "blue gun" they use for a mold which doesn't actually have the take down lever itself, just an indentation. So the normal takedown lever gets pushed to one side slightly by the kydex.
The lasermax lever is a tad longer than the original takedown lever.
SOLUTION:
Heat that indentation that presses the lever in towards the leather, and when softened a little, from inside the kydex with a spoon handle or similar object, push it out so it doesn't push the lever in. Hair dryer is plenty hot enough to soften just that tiny spot/indentation, and use a narrow spoon handle or something to push it out, don't use a heat gun.
Never had trouble with my Desantis Tuck This 2, nor my nylon holsters or leather holsters ... not with my Kholster which was loosely formed, but just the tighter formed kydex which form to the indentation on the mold gun, which has no lever.... it just needs pushing out there to allow for the lever. Just loosening the kydex from the leather with tension screws won;t fix it as it still will activate wen belt is tight, you have to reshape/push out the kydex indentation .... but it's easy and takes 2 or 3 minutes at the most.
When finished you will no longer have to explain flashing red lights in your pants

(I'll refrain from the DISCO and other PARTY jokes I heard due to the ten year old daughter rule)