Changing out lightbulbs in bathroom fixtures. Replacing incandescent bulbs with LED. No issues until I got to the third bathroom. Over the mirror is a three bulb fixture, working perfectly with the incandescent bulbs. First two work fine, but the third will not light. I tried different new LED bulbs to no avail but putting any incandescent bulb in works fine. Is there some Incad. Vs LED principal that I’m violating?