Walmart online order issues nationwide?

US here. Had a super shitty experience trying to pick up my Walmart pickup order today. The app was a mess and wouldn’t let me check in and no calls to WM were answered. 3 dozen cars waiting for their pickup order and no associate to be found. I stopped a Walmart associate(not a pickup associate) walking by my car and they mentioned a national wide issue but I haven’t seen any mention of it.