Solved

Lag in Race Viewer.

For the past few days ive had loads of lag while in the race viewer. Its so frequent that i just cant is KERS. Every corner it lags and only returns to play about 5 sec later when the straight is as good as over. Ive tried being directly next to my wifi router. Or closing all apps on my phone. Restarting my phone etc. Every race on all the accounts i have are affected but only on the app. Others in the league who are also on the app haven't had lag as frequent as i have.

its the problem to play on the mobile i recomend to play on the web version on pc

I have no pc at my dispossal at the time of the races.

What is the model of your phone and the OS version?

If you have mobile data/cellular data, can you try connecting via that and see if there is still any lag?
If that doesn't work, can you restart your router? Unplug its power for about 10 seconds, then plug it back in.
If you have access to a different wi-fi network, can you try playing from that one?

Let us know which of these you can answer.

Have a Galaxy J7 Samsung. Dont know the OS. I have no mobile data but tried 2 different wifi connections. And the past days the router has been restartes numerous times a day because of renovation work done in the house.

Will it be possible you can try a different phone? A family member or friend's phone?

Also, can you spectate races and see if there is lag in them?

When playing from your phone, does changing the race viewer quality to the lowest setting help make a difference?

your not alone 21/08/17 soo much lag - im using chrome on lap top with 38mbs download speed, tried fire fox no different .

I have seen it a few times cars teleport from one end of the straight to the other when they have DRS.
Use of the shortcut keys for boost on firefox slows everything down and then jumps forward. Even spectating a race pressing S & K does the same thing.