To be clear, you are getting an issue where the throttle turns off mid-flight or on take-off?
THe UK update was just scenery, so unlikely to cause that, though there was a game update of 22GB.
You can always remove the UK scenery update, and then try it.
SImilarly, you can unplug the rudder pedals and see if it still does the same or fixes it.
It might be that the rudder pedals are also configured to affect throttle.