It's a known bug in the latest version of Android web view affecting a lot of Google apps.

 

They did just roll out at least one update to ASW, was that the fix or is there still trouble?

 

i believe the latest update to the chrome browser and web view did the trick.....so most phones should be fine by now unless somehow the op's phone never got or received the update.

 

https://support.google.com/assistant/thread/23534932?hl=en
try the first response and let us know if that works.

 

To be honest, when I first started out with Android, I had the very same trouble.
Somehow, the stupid Google thing could not remember my voice for more than 30 seconds or so.
Right about the time I was going to smash the device to bits, I had a much better idea- just don't use the Google junk.

My life and devices have been much improved.

 

As a side note, where I work many of the guys use Google assistant.
Lately it has not been working well for them.

I never use it, finding that it is so much quicker to just open my browser and do a manual search for what I want, rather than argue with Google junk for 10 minutes first then giving up and doing it that way anyway.