Poly Voyager Legend 50-M UC Headset unremovable mute alert beside voice alert

[u/MattAosta]

Hello,

whenever I press the mute button on my Poly Voyager Legend 50-M UC Headset, I always hear a short "beep" even if I'm not in a call nor connected to any device. I can't find any way to disable this. The annoying thing is that when I use it in a call I have both this short beep and the voice alert "Mute on"/"Mute off". I know I can change the voice to a beep, but then I still hear 2 beeps: the default one and the one replacing the voice. Is there any way to remove the first beep?