Automatic Transmission Cooler problems of the 2014 Subaru Forester

Transmission/computer malfunction. Initially driving through mountains, using sport # mode in low speed curves on old road. Had one 'surprise' episode where in a straight section of highway, transmission dowshifted suddenly, with rpms racing up to nearly 5000rpm, although I didn't touch the paddles, and didn't even have my hands on them. After reaching a normal straight highway out of the mountains, an hour later, while simply driving at 75mph, the engine lost power, gas pedal became unresponsive, rpms fell, vehicle was coasting down from highway speed, and transmission did several odd shifts with varying rpms, and decelerations. Coasted to a stop, flashers on, off the highway. Engine was not running. Starter motor worked. Engine would not start. Flashing lights on cruise control, check engine, and "at temp", and possibly others not recalled. Called spouse. Contacted towing service. Opened hood: fluids, oil level, etc all appeared normal when checked. Temp display in vehicle showed normal (219 degrees radiator temp). Tried turning key on/off repeatedly to see if computer would reset: no luck. Spouse called 30 min later: online research found removing plug next to transmission shift lever in center console, and using long screwdriver to press switch at bottom might reset some device. Tried it different times: key 'on', key 'off', etc, reset appeared to take effect with key 'off', then turned on. Vehicle now cooling down (45 minutes on roadside, not running). Now restarts when cranked. Various lights "check engine', 'at temp', cruise control light no longer flashing. Warning on panel stating "vehicle hill start assist not available" no longer showing. Car appears to run. Drove ~ 5 miles to roadside business. Cancelled tow. Checked car again. Drove gently to home city. Rescheduled flight to alaska vacation because of the delay.