R class multiplayer races won't accept Ferrari 312

Hey all,

I just did the latest update to Forza 6 and the R class multiplayer races will no longer accept my R class Ferrari 312 #1 Scuderia car. Instead it tells me to pick another car. When I go to select my Ferrari it isn’t listed in my garage of acceptable cars.

Any reason for this? Thanks.

Same issue with the Lotus 77, you can use it if you take it before going to multi.
I think those cars are too much powerfull compare to the others to be banned from multi