It happened again today at 83781 miles and I was able to record two reproducible videos.
Highway:
https://youtu.be/SfaDqWCDl6E - I was driving from on the highway and noticed sluggish shifting prior to the overheating error. I was able to clearly reproduce the conditions and outcome of the overheating error. The error occurs when downshifting to 6th and once it's back in 7th gear it gives the overheating error for approx 20 secs.
1st Gear:
https://youtu.be/NWA6g0NulCA - In this video I'm a stop sign. As soon as I pull up from a dead stop it gives the overheating error. Prior to this video it also gave the overheating error when sitting dead-stop in traffic with my foot on the brake. This time the car was not on a hill.
I'd love to hear any thoughts on this!