Cruise Control Issue

[cyclone1410]

I have an issue with the Cruise Control on my 2013 MC Zetec Ecoboost that started about 8 months ago. When I start the car and go for a drive, if I push the Cruise button on the left side of the steering wheel, it won't turn on. I can push it as many times as I like and it refuses to come on. If however I push the Speed Limiter button a couple of times, the speed limiter will eventually turn on, after which if I then push the Cruise button, it will then turn on in standby mode like it should.

The interesting thing is that it doesn't do what I have described above all the time. For weeks on end everything will just work just fine then one day it will play up again. Really strange. Been to the dealer a few times and of course each time it works perfectly with no error codes reported.

Anyway has anybody else had the same issue and if so how was it fixed?