I have both in my house (5yo)
1st Weirdness: We have a 2 room bathroom; one has a shower, sink and toilet, plus the GFCI. The other room has only a vanity and mirror; its outlet is daisy chained off the GFCI in the toilet room. About 3 month ago the GCFI tripped for no apparent reason. I reset it and it was ok. BTW, there are no other outlets, inside or out, on this GCFI. A few days ago, I tried to plug a small fan into the GCFI (in the toilet room) and it didn't work. I 1st thought it was the fan. The squirrel cage seemed a bit tight, and dirty, so I cleaned it up anyway. It worked well on the bench. Brought it back to said GCFI and it still didn't work. BTW, the LED on the GCFI was on. And the toothbrush charger on the remote outlet in the vanity room was also on. So I pushed the test button on the GCFI and it tripped ... reset it and both the outlets on the GCFI and the remote outlet in the vanity room now worked. Weird. The only thing I can guess is that the GCFI has 2 sets of contacts, one for the outlet built in, and one for the daisy chain. As I said, weird.2nd Weirdness: Last night we had a thunderstorm blow through and it dropped about 1/2" of rain and lots of noise. With the largest thunder, I happened to look at the clock .... blank! I said, "power outage!" Then I looked in the kitchen and there were some signs of light. Actually, power was on and all those LED on everything were still lit. The AFCI had tripped. It reset fine. It reset just fine. Weird!