Heated grips turn off with cruise control

[ch2004]

Has anyone had a problem with the heated grips switching off when you turn on the cruise control?

I was out on sunday for a run round loch ness and got caught in a shower. My heated grips work well and i switched them on to low power to heat my summer gloves. I was behind slow traffic with no chance of overtaking and thought i would 'play' with the cruise control.
As soon as I switched it on the grips turned off! Tried it a few times and kept happening.
It is booked in for a service at the start of July and will ask them to have a look at it.