Bmw m3 GTR Reward bug

Hello need for speed team!!
Yesterday I've finished all the 15 blacklists cars in Need for Speed Unbound, on an PS5 platform.
I've see that the reward card was the original BMW M3 GTR LE (2005) but I've a problem that cause a bug on for receive this reward.
Everytime I bought this car from custom cars label on the shop, in offline mode, when I turn the online mode on, the game remove the BMW M3 GTR from my garage...
I think it's caused by the online check or something..
Please, I love this game, do you guys have knowledge of this bug already?
Thanks!!