It certainly seems to be a bug so I will escalate to the Devs for further investigation. But out of interest, why did you run Inters and Wets in what appears to be a totally a dry race?
Just before the race, when i checked it was raining. It then stopped and by the time I was able to get online it was already dr. Howver, thinking I had met the 2tire rule, and to be safe, i used a third compound, but still got the DSK
By the looks of things you were the only car to qualify on Inters which suggests the track was dry for qualifying. Also looking at the tyre strategy all of your competitors used, the entire race was dry.
We have been discussing this case on the volunteer server and have a theory as to why it happened but thus far have had no input from Devs. Until we get confirmation from Devs I am reluctant to give an opinion, it would be speculation and possibly incorrect.
I'll keep the thread open for now.