This is disappointing to hear that the issue isn't resolved in more vehicles. I just checked my messages in my Fordpass app and it isn't telling me which version, but I received an OTA update many many months ago and my trans temp gage now stays in place. Ford haven't figured out how to fix the update that broke the lower center of the dash showing you which song you're listening to unless the radio screen is up, but they did fix my gauge customizations...
Honestly the tranny temp gauge, as well as the engine oil temp gauge, is not useful to me by all means. I have to purchase an Ultragauge MX to show real numbers of the transmission oil temp.