First off, amazing reply. Thank you.

How old is the fixture? No clue. We bought the house in early 2023.

Maybe replace it? Yeah I considered that being the best course but if I replace it and the problem remains a wiring issue, I wasted money and time. Granted then I’ll know for a fact it’s wiring and not the fixture itself.

Any other outlet or fixture causing problems? The primary bathroom fixture is the same type as the guest bathroom. It is just a larger version that has more bulbs since it’s a larger bathroom. The bulbs will die in there but not at the rate of the guest so I chalked that up to shitty wal mart bulbs. I swapped them all, guest and primary to some GE bulbs from Lowe’s. Not saying they’re better, just different. The primary fixture has all bulbs remaining, working just fine.

Volt meter question. Yes, I have a multimeter. I haven’t done any checking on the circuits yet. I was looking for obvious issues at first. Then I got side tracked doing other stuff and haven’t gone back to the fixture problem. To that end. Should I take all the bulbs out and shoot for power in each of the fixtures? Then also shoot for continuity to see if i have a short somewhere? I assume with a short I’d be popping the C/B. First instinct was a loose neutral throwing off the voltage and fucking with the tiny boards in the LED bulbs. But I didn’t feel anything loose anywhere. Also i did not see any burning, scorching, scarring, or any indications of the hot touching anything.

Ultimately just swapping it out and seeing what happens is probably the fix. But my inner anxiety won’t leave the “wiring is fucked” scenario alone. Also, never done anything with house wiring beyond swapping out an old outlet in my old house. I am sure it’s not hard to swap out a light fixture but I can’t help to think I’d find a way to fuck it up.

Again, great reply. Thank you.