After Engineer reports that car has a problem radio button disappears so I can't use radio anymore and I get no radio calls from engineer either, gameplay (race) continues like nothing is going on and once I finish the race and I have no control over the car radio comes back and engineer says "race over take care of the car on the way in". It happened to me in multiple races already in career mode with different car failures, it's definitely a glitch. In the video below you can see it happening.
@BarryBL as I mentioned before I never get to retire my car in my team mode, you can see that my engine is blown for almost half of the race. And this problem may be related to the radio problem, when one happens the other one happens as well. So basically I drove most of the race with a blown engine and no radio.
By the way I couldn't see the smoke until I got to replay mode after the race, during the race I saw the radio problem happening but I continued.