I can't see any problems with the beetles contaminating the honey, once the bees are ready to use those cells, they'll chase them out until they find somewhere else to hide. Then the bees will clean the cell out before depositing any honey into it. That's my guess.
I see lots of beetles hiding between the perspex & the wooden frame of my observation hive. The bees chase them there & put propolis in place to lock them in.
It's when your worker population drastically drops that you run into trouble. When that happen, no number of beetle traps will save a hive. All you need is one mated female beetle that didn't get trapped to start the damage.