Make it four. Happens when lightly accelerating around 45-50 regardless of profile and mode and Speedway or Costco gas. Have brought it to dealership and they said, without any research, that maybe Kia would put out a service bulletin at some point. I agree with another member who said it seems like a fuel pump issue.Make it three. Happens around 40-45; feels almost like the engine cuts out for a split second. Doesn't seem to be triggering any codes, and I can't reproduce it often enough to take it into the dealer.