Hi Mike,
I'd love to be able to give you a definitive answer to your reply, but I do not have specific experience on your exact model. I fixed another make of cooker with exactly the same problem, where the oven clicked continuously and the rest of the burners did not. I checked that the flame sensor and thermocouples were not out of alignment and also checked for moisture in the circuit and finally resorted to fitting a new spark generator, which did the trick. So, I can confirm that it is possible, albeit on a different brand of cooker.
Something that may be possible, is to trace back the ignition wiring from both ovens to the spark generator and swap these two wires where they connect to the spark generator. If the fault then moves from one oven to the other, then it's almost certainly a partial failure of this generator.
It would be useful, if you find the fault, to reply here with the information for future reference.
Rupert
March 2020