The only time it should flash (I think) is when you have cruise set and then accelerate (or the car speeds up going down hill) and it is going 3mph or more than the set speed; are you sure you have paused it?
Definitely paused, does it most times, either from braking coming up to roundabouts, or having pressed pause on the steering wheel. It's pretty clear on that display.
You can see the speed drop and is well below the set value.
When left on pause, the cruise speed indicator will randomly flash. It might be at gear changes or speed changes, I couldn't see a consistent pattern. It was set a 80, cam up to a round about in slower moving traffic, flashed at 40, flashed as I was pulling away from the roundabout. Random.