I had this happen to me today, but only once. Was driving a canyon road (not super hard, but having a good time) suddenly went into limp mode. High revs, no speed increase like op said. Parked, looked around for any hoses or anything obvious. Nothing. Turned off the car, scanner found over boost code in pending codes. Cleared the code, started the car and she drove okay for the rest of the day. Doesn't seem like anything broke, did a fuel line kink for a bit and scared the car into limp mode or something? Not really sure where else to look considering the issue hasn't come back. Also, no mods and no CEL. Only knew about the code cause I looked for it.