Multiplayer problem - starting race

Hello guys,
When i make a server with players or AI, i have strange problem with starting race : race start with rooling for 3 sec and after all cars collide between them. Whatever start i choose (roling, standing, formation) the race begin allways in this way.

Any advice is welcome

 

Does it happen in all Car/Track combo or only on a specific one?

 

You are right. Only on addon track. In this case is Snetterton 300.
I thought it's a general problem but no

Thank you Erick

 

In this case you should report the problem in the race department topic of the track!