Do dryer sheets interfere with the dryness sensors in a dryer?
Yes.  

The dryer sheets shed tiny bits of its fabric.  They sometimes coat the sensor.  Causing the dryer to work harder, thereby shortening the life of your dryer.  This could easily be fixed (if there was an issue) with soap, water, sponge...  The same thing goes with the lent filter.  Even if you clean out the lint, the very small particles from the dryer sheet can get stuck in the cross-hairs.  Also can be fixed with soap, water, sponge...

This is comparable to saying does soap cause tiles to get dirty.  Yes but you need to use soap in a shower and can clean a little.