Voice assistant volume

Hello,

On  Venu 2 Plus Voice Assistant which is connected to Google Assistant on my  google pixel 3 work fine.  Same watch on pixel 6a I could barely hear anything. It works but the volume is so low that I had to practically put the watch on my ear to hear it. I tried all the volume settings under System > Sound and it doesn't help. All the settings that I knows are the same on pixel 3 and 6a.

This issue is specifically for Voice Assistant volume only as other notification sounds, voice call, alarm etc are loud and clear. 

Pierre