I was born in Utah and moved to New Mexico when I was 11.
Spent many summers in Idaho before move.
Friends in NM said I had an accent, I pronounced those same words the way you did.
Said harse for horse.
I worked hard at correcting my speech to fit in.
“Spent many summers in Idaho before move.”
I don’t know if it is because people in Idaho had/have a laid back lazy way of saying things or what. I know my father always pronounced things that way, but my mother didn’t. Hummm! They always said I took after him. :-(