Fender here... for a long long long time. Since about '72.
Recently... a few issues on Fender strings. Had a streak of 'em that simply unwound at the ball end. No breakage... just "unwinding".
Then in this last set... I got an two piece high E string, right out of the envelope!
I did bring the unwinding to their attention, and they generously comp'd me some sets.
I like the tone and feel, but.... those high E's are getting pesky. Hopefully they'll settle down again.
And, I gotta let you folks know, I usually get 30 to 40 sets of strings at one time, all the same type 150R . That said, it could be the run had issues, and they've already gotten beyond this.