Did you try a factory reset of the TV? (not just a turn off/on).

Yes, strange I agree. Just to update, as few days ago i swapped the culprit google hub back to the main ssid and turned off guest wifi. No issues at all since then. Originally I used the same SSID...

Hi, If your b box is in router mode and your Deco is also in router mode then you may have different subnets whihc may be your issue. Also, it's usually recommended that you turn off the wireless on...

Hi, maybe the M9 doesn't have the feature yet. Not sure. App version I am using is 1.7.7. This is what my wireless settings screen looks like...

Hi, it's under Wi-Fi settings, not the Advanced settings

a 'crude' check is to ping each deco. i find the pucks on ethernet return <1ms, wifi returns 3-5 ms...