I have LEDs in my bathroom. What I have noticed is that they will flicker at times, but if I run the hair dryer, they stop flickering and are actually a bit brighter. The dryer loads the circuit which drops the voltage a little, so they must like the lower voltage.
Strange.
I’ve noticed that some LED’s are better than others. I bought LED headlight replacement bulbs for my Scion FR-S a few years ago and they only lasted a year. It was because those bulbs are also used as my “daylight driving” lights. And in that mode, the electrical system pumps low voltage into the lights. These were not dimmable and it basically burned them out.
We got one for over our oven as well and, though the switch gives a bright and dim setting, the lights are not dimmable so we just never use the dim setting.