Yeah, I think tmv is right. No updates. I updated mine and even changed the EGS module with a newer one thinking that it might have a firmware that would fix the hard downshift.
I monitored the transmission temperature and it happens only when it worms up. I also rebuilt mine including the valve body and also replacing the VB and the problem is still there. Talking to tranny shops I didn't get a clear answer. It seems to be a combination of clutches tolerance and VB housing/pistons wear.
If the downshift you have is very hard you have a risk to damage the axels and drive shafts. This is what happened to me.
Make sure your heat exchanger is not clogged. You can try to monitor the tranny temperature with inpa if you have access to it and go from there. Thats the cheapest start.
I also added an oil cooler on mine and I have the engine running at 96C.
If you don't have other transmission problems or don't want to get a reman transmission you can add a transmission oil cooler for $60 if the heat exchanger is ok and the hard downshift goes away.
Just make sure you determine the conditions when the problem occurs.

__________________

4.8is 2004 imola red
4.8is 2005 Black on Black - DINAN/2 sold
4.4 2004 X5
2003 330xi
2008 328xi - sold
4.4 2000 X5 - sold