Then unfortunately, most likely the switch itself has gone bad. How old is it? A fairly high percentage of the early model a GE switches do you fail about six months after they’re out of the warranty. This means they’re technically not “defective” but it’s still annoying. It’s not a super high percentage, maybe 15%, but it’s definitely more than some other more expensive brands.
Many people feel it still worth it because the GE switches can be 50% cheaper than other brands so even if you have to replace 10 or 15% of them into years you still save money overall. But it’s obviously very annoying.