Wheels caught fire shortly after crossing stream

I was playing the "Downhill Rally" scenario on the Utah map, and towards the end, the road crosses a stream.
Between 20 and 5 seconds after crossing that stream, the wheels caught on fire.
Soon, the wheels began to pop.
The wheels all popped by the time I finished.
I took the screenshot after I finished the rally.

If there's anything else that could be helpful, pls let me know.