Constant completition sound fix

Yup, I'm having the same problem.

Just adding another voice to the chorus ... if you can hear me over the completion sounds.

What completion sounds? I cant hear you over the non stop completion sounds from my game

I usually play with the sound off, but turned it on just to check. Same thing here.

I play with my sound off but turned it on to check. Mine was fine.

I too am suffering from the constant completion sound.
I've been playing for a few years and most often when there are prize boxes available I don't ever see them as I already have most everything.
As for playing without sound, I would however sound or no sound with the contant cycle happening the game play is extremely sluggish.
It is hard to tap on characters, buildings, even just moving around the screen is slow and difficult, often having to tap or swipe multiple times to get it to respond.
I've all but given up trying to play until this gets fixed.

I actually just turned on the sound to check out if I've got the issue as I already have everything from the boxes and sure enough I'm getting the comple sound too although it doesn't seem to be upsetting the gameplay on my S8+ though, thank goodness that I play without sound or that would drive me crazy.

Yeah. I just turned up my sound and I have it too and yes it's annoying.

the neverending drums
https://www.youtube.com/watch?v=Li5WFQxEOxY

Pure guess but I suspect that the constant completion sound will go away with the end of the Black Friday sale so they might not bother to fix the problem and just leave it to fix itself.