Didn’t jump right in once the update was downloaded like many will have done and only just got round to checking out the new business in FH4.
However, on completion of the first “Isha’s Taxi” task, the screen went black and the music continued for ages, with no loading animation anywhere.
When resuming, the black screen and music continued, so done a full shut down and it made me do the first job again, but was OK the second time.
This was on my Xbox On X.
So if it happens to anyone else on XB1, go to Settings>Power & Startup>Turn Off or Reset>Full Shut Down, then reboot.