I got the car back a week ago with a new throttle body, tensioner, and belt from Roush. It seems to be driving well so far, but we'll see. I made it known at the dealer that, if it happens again, we need to look at a "long-term" solution. They are sending me the paperwork on what was done, and then I'll make the call to Roush to review and let them know my position as well.
2018 GT Base | Black | Auto | Roush Phase 1 Supercharger | Roush Triple Adjustable Coilovers | Forgestar 19X10, 19X11 wheels