Hue Motions Sensor dissapear / go missing

Motion sensors were fine, and today they’re gone, dissapeared faster than my salary.

Rebooted Hue bridge & HA. Tried cursing a bit too.

Alexa and Hue apps can see the motion sensors. HA not at all.

Any ideas? What’s the standard operating proecdure for this kind of thing? Re-install HA Hue Integration?

HA connected to Hue Bridge using standard Hue integration.

SOLUTION Delete the sensor in the Hue app and physically reset with a pin.

Typically, the first question to ask is:
What changed in my HA setup between the last time it worked , and now?