I had two issues today.  Both related to the sim update turning on ALL the assistance features.  I did not see this in any other update.  For me it cause my elevator trim to be taken over by poltergeists and my fuel to not burn off.  On the day the sim came out I turned off all assistance.  Didn't check it at all after.  Today I had to set it all back to OFF where I want it.   So make sure your assistance settings are what you want them to be after the update.