Can't use Bixby command to change sound mode to 'silent'

[pisindeed]

Hi,

I'm using S10. Current firmware: One UI 2.0, Android 10. I remember using Bixby command to change sound mode from 'Sound' to 'Silent' back then. Now it's not working. My command was "Change sound mode to silent". Bixby only replied "Sound mode is already set to sound" and refused to switch the mode. Anyone know how to go around this? 

Thank you in advance.

[Syifaul]

You can try "set ringtone volume to 0"