On the Deflation Warning system on the MK3 Jazz I have had severe issues with both cars. This current one is new and gave me, iirc, 4 false alarms almost exclusively after motorway cruising, the same happened on my first Mk which was used - 3 false alarms.
Both cars settled down eventually after repeated recalibration.
Didn't yours go back to dealer to be made less sensitive, or 'tweaked' as they may have called it ?
In the end it didn't. We had an agreement that the next time the DWS went off I would not recalibrate and take it in with the warning light on. That was the last false arm, it never went off again!