When using Oreca 07 and Norma M30 together, there is a bug that reflects the sidewall of the vehicle selected by the player. Since this bug has been confirmed in single play, it is highly possible that it has also occurred in multiplayer.
Additional Information There are no bugs in the Porsche GTE with the earliest textures and the 488 GTE with the latest textures. It seems that only M8, C7.R, and Oreca, which seem to use mid-term textures, have bugs.
I've got all these so far: Norma M30, Oreca 07, Aston Martin GTE, BMW M8 GT3, BMW M8 GTE, Corvette C7R, Porsche 911 GT3R.