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Motion sensors stop working after 9pm (UK)

elsworth1983
Community Member

I'm deep in the Google ecosystem and have a ton of devices. For the last few weeks, my motion lighting automations have gone haywire with a bizarre, time-based bug.

The Gist:

Between 8 AM and around 9 PM, everything works perfectly—motion triggers lights on, no problem. But, after 9 PM, the motion sensors (both Hue and Aqara) simply stop detecting motion for the purpose of triggering lights through Google Home.

What I Know:

The actual lights are fine. I can turn them on and off instantly in the Hue app, so it's not a connectivity or power issue for the lights.

The sensors might be fine, but the automation tied to them is failing specifically after 9 PM.

What I've Tried (No Fix):

Deleting and recreating all automations.

Joining and leaving the Google Home Public Preview.

Full network reset (new SSID and everything).

Has anyone seen a weird issue like this? It's like Google Home flips an internal switch at night that disables my motion triggers. Any suggestions for things I haven't tried yet?

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