Google Nest Community

Yes still suffering the same issues to the extent I've swapped my network out because the Google WiFi was so unreliable.

I did but changes the isp router to modem only mode and it made no difference

I have tried all these thing already. If I plug directly into my ISP modem I see full speeds but I lose 30% of that as soon as it passes through the Google WiFi

I see the same. 1142Mb to my modem, 500-700 at the Google WiFi side. Also see some video streams go woefully bad from time to time and the only fixe is restarting each WiFi point. I've raised it with Google but not had a good fox yet