It's not a problem, it's working okay.
Apart from the noise from the pump, that's a known flaw.
But the only problem is that Corsair's manual for Hydro series is a joke, nothing there is explained and there is thread after thread "I press the button but the fans' speed doesn't change".
And, you're using Gentle Typhoons, good luck with that, regardless of the profile on the H100 I tested it on, their speed didn't change. The H80/H100's built-in fan controller is only working okay with stock fans or fans that behave in a similar way, GTs don't.