Some times when you break a spoke others will follow unless the entire wheel is re-tensioned. Most shops will not spend the time needed.
HOWEVER, Faint hairline cracks at the spoke hole are IMHO cracks. Wheels and cracks do not go well. I bet it's where the spokes were replaced.
I think the rim is on it's way out and time for a new wheel.

Have another shop check the wheel and if I am correct then lose the other shop.