Depends what kind of moss. Some mosses are ”born” because of the very high humidy and CAN cause mold and bacteria in long term if mosture stays high..
anyway usually theres some kind of mosses mixed into the medium soils, for examample BioBizz lightmix contains curdmoss which is basicly good for the plants.
Hey mate, shouldn't be an issue.. if its bothering you just cover the top of the pot with something to prevent light getting in.. no light=no growth. Simple no invasive way to get rid 🙂