i don't think so. in fact, i think its a sign of good bin heath.
when i messed up my worm bin by feeding it too much food, mold was growing much less robustly. to me this means a more acidic, bacterial-dominated bin. springtails also multiplied, and it just didn't look happy.
yeah its not a problem, gotta remember worms don't have teeth, they eat the slimy stuff that the bacteria/fungi/whatever is making, that's what the worms digest.
Sorta the same concept as the microbes in your soil
I always bury my food, and always freeze it prior to giving it to them, their favorites are melons, pears, apples, and salad mixes. The more slimy and rotten the better.
bury it with at least a good inch of vermicompost on top and you won't have flies or smells.
Well assuming you have a good amount of worms in there.