I was unaware of the dual band on a single network issue with Google
Nest Wifi. It does seem to be an issue with many people/products.Don't
know if this will work or if you've tried it or not, but a
recommendation is to move far away from the router ...
I've been able to possibly come up with a solution as I was able to
replicate the issue you're having.Go into Google assistant settings and
click on Languages (For speaking to your assistant) and choose
English(US) as the language.I did the reverse (...