This is just a recent example but there just seems to be endless issues and incomplete functionality with assistant. Nobody from Sonos is explaining what's happening or why we had to wait so long for something so bad.
Best answer by Ken_Griffiths
I haven’t seen too many complaining. Reviews like this one have been fair...
Rumour was that 20,000 users began using the Assistant on Sonos from day 1 of the launch ... dunno how true that is, or what the uptake is now, but not many complaints around here. Most just want further integration, like 'grouping' and 'casting' etc.
If you are experiencing dropout issues with your speaker that’s more likely to be unrelated to the Assistant integration and more likely to be interference or network issues.
Here are a couple of links that may help...
Reducing Wireless Interference
Local Network Stability