Thanks for this info. This explains why since last summer, I suddenly had to change AC temp on auto by 4-5 degrees. It was an update in June, so following May 15th update, and not part of it. Used to be 74deg was plenty good to keep me comfortable in the cabin. Suddenly after an update, 74 was causing everyone in the cabin to sweat and had to keep it at 70 or 69 to be comfortable - It was an overnight change. The whole week outside temps were the same (~100) and I was driving same roads around the same time. Tech also kind of indicated what you are saying, but didn't go into details, to say the least. Then with future updates, AC behavior started to change on a seemingly random bases. While I can't confirm it is the same as what's happening with your car, I could see it is most likely.
On a positive side, besides Tesla taking away capacity from my battery, I have had no visible degradation.
Question for everyone that may be related to this topic: In addition to this, I noticed that front vents don't always blow same temp air, including the two around the display. For example, driver will be colder than the passenger or the other way around. Anyone else knows anything about this?