Bentley forzathon achievement [xb1]

Over the past few days on the last few forzathon for the last three days.
and regardless how many rivals or races in Bentley’s then with out a Bentley

So unsure if there has been a bug with this event or something

Have you tried hard resetting/ cold booting your console properly yet
Have you been able to get the rewards in the previous forzathons

i have done that and yes I have actually. in the past no issues