A buggy Fitbit update is blinding sensors on the Pixel Watch 3 and 4

A Fitbit firmware update is causing SpO2 and skin temperature tracking to stop on some Pixel Watch 3 and Pixel Watch 4 devices.

Reports from PixelCommunity, Reddit, and tech outlets indicate the update removed sensor permissions needed for passive health monitoring.

Google has acknowledged the bug and says a fix is being prepared.

The issue can leave users with gaps in wellness data, underscoring how fragile wearable health features can be.