No, I've seen it too. Particularly frustrating when you're trying to gold a license test, and you have it according to the first number, but you miss it according to the final number.Perhaps I'm not describing it correctly or it's a known and accepted occurence.
For the single-player events I've experienced thus far, the on-screen clock stops once when my car crosses the finish line, but then adds a fraction of time to the actual result. This has made me scratch my head for more than one challenge event.
If I see the clock stop when my car crosses the line, I expect that time to be registered as final.
Am I misinterpreting the fraction of time added?