Pathward/Incomm Visa always works for me at WM. Just don’t swipe more than 3 cards at the same register at once. Once a card is locked, the only recourse is replacement.
Pathward/BHN Visa everywhere card works at WM but some weird limit depending on the day or time I haven’t figure it out yet. These cards don’t get “lock up” so you can try again at another time.

I avoid MC no matter the issuer or processor. They are just trouble.