Unfortunately the latest firmware (v9.10.4.1) doesn't solve the issue on Pixel 8 Pro

Same here. I thought the new firmware upgrade would help with the Google pixel 8 and the orbi 970 and 971 but I have to manually reconnect when walking around the house. I also started a continual ping on my dell xps13 with WiFi 6e and with cmd 8.8.8.8 -t and every 20 pings the request would time out and slowly 40 ms becomes 150ms and then time out. The internet on my laptop is much more stable when connected with ethernet. I may ask them to replace the router just to see if maybe it is faulty hardware.