help, really bad fps in vr during night rain races in hockenheim

hi first of all the game with new ffb is a joy to drive and with my new g2 a joy to see. i am currently on 3080ti and i9 10900k, during day session with 26 cars on 60hz on my g2(100% steam vr and 1.0PD in game), the game runs smooth like butter, in night and rain is a total mess, is that me or a problem of optimizations?!?some tracks are perfect in night and rain and others are a mess...what about your experiences?!?

 

tryed other track, same conditions and everything was fine, so the problem is related to some tracks only, hope for some optimizations