Michael: I don't have the definitive answer to your question - but maybe if you understand how the information about "the station ID and the music title and artist" is received by the MIB on this car, you can answer your question, yourself?
So, here in the Antipodes and in addition to the fundamental audio signal (which is transmitted using an analogue radio protocol) - FM radio also transmits a digital channel called Radio Data System (RDS) which allows for the broadcast of data like "the station ID and the music title and artist". So, each major FM station (meaning Capital City and provincial country stations) in Australia has its own pair of both analogue and digital channels
However, the thing about RDS is that proper reception of the digital data is more prone to the strength of the primary radio signal. It's probably too much information for this reply - but this happens because RDS is transmitted over a sub-harmonic frequency of the FM stereo signal. This means that often on FM stations, when stereo reception is lost because of a weak signal - RDS also fails!
So, I would be interested in your reply - but maybe the location of the car at work is such that for the signal strength for the problematic FM station, the primary audio signal can be received - but RDS (and likely stereo) reception is intermittent. Perhaps border-line RDS reception causes the digital information (like "the station ID and the music title and artist") to freeze as you explain in your post? I'm guessing- of course!
Don
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