Sound muffling underwater activates too late

[catreplicators]

Going in two-block-tall water does not muffle rain noises, despite the player being fully submerged. Three block tall water does muffle sound (not enough imo, but that's a different issue).

[CreativeMD]

I could not reproduce this behavior. I stand in two deep water and the other sounds fade out almost entirely. What version of Minecraft and AmbientSounds are you using?