Strange problem with DLC cars

Logged into FM5 today to find over half the cars in ‘My Cars’ say DLC in the top right corner. And instead of getting the ‘Select An Action’ menu when I select one, I get a ‘Purchase Options’ menu?
Some of the cars are got for free last week from the DLC offer, but most are cars I bought for credits from the showroom after downloading the DLC packs when they were released and have already been tuned and painted, plus its the same for all the ‘Day One’ and ‘VIP’ pack cars, I’ve bought.

Going into the showroom doesn’t help either, most of the cars have the DLC tag in the top right corner, the ones I haven’t bought have both FREE and DLC in the same corner, but selecting any of them brings up the same ‘Purchase Options’ menu?
I’ve tried accessing them form rivals too, with the same results. Any one have any idea whats going on ?

Try restarting the game.

Try cold booting the console - hold power button for 5 seconds to turn it fully off. Wait a few seconds and then turn it on and try again.

Try going to my games and apps and on Forza press menu button and manage game. In there you should see what dlc you own. Do any of them say you need to install them?