Don't know whether it's the track, bike your my setup but riding the bike on this track feels like its either mis firing your traction control keeps cutting in even travelling in a straight line.
I dont think it's my setup due to the fact that this track in beta3 gave me know trouble what so ever, could easily do 1.19-1.20. Today 1.22 and I feel like getting of the bike to push its that made.