I recently upgraded one of my RLC-522 cameras to an RLC-811A 4K with 2-way audio capability - installed on a Reolink NVR. Had the same issue you mentioned.

All Settings screens (directly logging-in to my NVR, Browser Interface, Reolink App & Reolink Client App) on for my NVR indicated that the Firmware was 'up to date'. It was not.

I had to download the newest Firmware revision from the FAQ page for the camera on the Reolink site. Installed the Firmware from the Browser interface and all worked properlike. It also added the options to control the backlight and alarm.

Hope this helps.

I recently upgraded one of my RLC-522 cameras to an RLC-811A 4K with 2-way audio capability - installed on a Reolink NVR. Had the same issue you mentioned.

All Settings screens (directly logging-in to my NVR, Browser Interface, Reolink App & Reolink Client App) on for my NVR indicated that the Firmware was 'up to date'. It was not.

I had to download the newest Firmware revision from the FAQ page for the camera on the Reolink site. Installed the Firmware from the Browser interface and all worked properlike. It also added the options to control the backlight and alarm.

Hope this helps.