Yes!! This is exactly what happened to me today (and almost every other time I use it)!
I went to pay, and the girl was like, "Oh do we take Apple Pay?" I said, "It's Samsung Pay."
Her manager walks by and she says to her manager, "Do we take Samsung Pay?" to which her manager replied, "No, we're not setup for that either." And I hold my phone up to the CC machine, and it beeps. And the Cashier says, "Oh, I guess we do take it?"
Smh. It's not like this is brand new. This has been around for years now. Not just Samsung Pay, but mobile payments all together. It's not new, just let us pay and move on with our day already! lol