Solved

Quick Race - Health

What did you try to do?
I tried to heal the driver after the quick race with coins

What happened instead?
The heal button was grey and was not able to heal driver but was able to heal the driver through the app by watching ads.

Did the problem happen while using wi-fi, mobile data, or both?
Wi-fi

Did the bug happen in the app, on PC, or both?
Both

What is the model of your device?
Samsung Galaxy J3

What is the operating system?
Android

What is the version number of the operating system?
i am not sure

What operating system is your PC?
Windows 10

Which browser did you experience the problem in?
Google Chrome

Can the bug be reproduced?
I am sure it can be reproduced

Additional comments:
I think more people would do the quick races if you were able to heal your driver with coins right away.

I made one quick race and could heal my deiver with coins afterwards, but I had no problems.

I will give it a try.  Just same thing happened on App and PC

Just wanted to update that clearing the cache worked.  Thanks for your help