@daringfireball I didn't get hit by this but I decided to check my significant locations. Oddly my home is not on there (of the ones I can see). But 2 pubs and a barbershop are. I haven't visited them in months but I guess I walk past them maybe every couple of weeks.
I'm a bit concern it's either picking the location of cell towers or something has gone wrong with my location tracking.
My home should be at the top of the list but my gym surely should be on the list too.