Cosmic Turtle hideout sounds aren't mutable with Ambient Sounds slider

The Cosmic Turtle hideout has various noises from the water feature and the turtle itself that are already getting grating when tabbed out.
They are only mutable with the Sound Effects slider and not the Ambient Sounds slider as one would expect.

I can confirm, there is an additional ambient sound on the sound effects channel. It would be extremely nice if you can put that sound queue on ambient sound too, otherwise I have to mute sound effects in hideout and then I can't hear any other sound effect :(