When I was younger, I broke E strings every once in a while (in a Rush cover band

)... I didn't leave the strings more than 3-4 wks - so not where they would get old and funky

usually GHS Boomers at that time
I break 3-4 per year, and now play DR Pure Blues .40 on my 4 and 5s (mostly Warwicks) and carry about 5 backup .40s as those I will break on occasion. Strings get replaced about every 3-4wks (on the basses I'm playing at the time) but G does get some abuse with popping and double thumbing. Always at the saddle the core will break and just unwinds.
Oddly, on my 6 which has a DR Pure Blues .30 I've never broken one... But do carry a couple of spares just in case as it does feel delicate
Its not a brand thing either, as this has always happened to me with other string brands as well (Elixr, GHS, Warwick, etc.).
On my guitars, it's always been the high E that would break... Usually at the nut (Fender, Gibson, Etc.). I also have a Charvel with a funky 80s headstock where the high E has a bend at the nut to the tuner which causes a stress point.