The McLaren 720S GT3 DTM has no visible rear lights or brake lights. The normal GTR 3 version works correctly under identical graphics settings and conditions. Both screenshots were taken while holding the brake pedal. Tested with #16 livery.
Update: I also tested the #25 livery. The rear lights and brake lights do not work on this livery either. Both DTM 2025 McLaren liveries are affected.