Tom Wischhoefer

Would like to add to this.

fish swimming noises don't seem to be respecting volume settings

1) fish swimming is always at 100% and almost seems (probably not actually) to get louder the longer you're around them

2) If you turn off friendly creatures sounds, there's still a weird "pip" glitch like sound that is at the same time as if they were making the swimming sounds

3) if you turn friendly creature sounds to 1%, it's still just as loud as 5-10-20-100%
Update
Seems to be fixed in 20w13a

@Donsilverio You would either need to wait for 20w13a. Or look into editing the NBT data and removing the maps from the affected player's inventories. 

I've also had all of my item frames with maps or items in them disappear upon updating. 

Can confirm, this is Datapack related, Follow Justin Hackbarth's instructions and it's fixed