Has anyone experienced high pitch noise on an RR-Sport HSE with an A.C.E. pumpt?

Hi, I drive an 07 RR-Sport HSE with A.C.E. system.
Since I had it, I clearly hear a high pitch noise once the engine accelerates.
Took it to dealership(s) multiple times and their answer was "it is normal".
I don't think it is normal for such a vehicle to have such noise knowing it's an 8 Cylinder SUV with plenty of horse power, but sounds like a broken water or steering pump.

There seems to be a small number of people experiencing this noise. I have seen other HSE (same yr and model) with an A.C.E. system, but without such noise.

I find it odd to consider this noise normal. Could it be a pulley tensioner, or a bad bearing, or pump about to go bad and dealership wouldn't touch it until it breaks?

I have seen posts/forums talking about refurbishing the A.C.E. pump to resolve the issue (U.K. based posts). and Here in the U.S. no one have yet resolved this issue.