DUALR3 auto calibration missing on one device

Hi,

I have two DUALR3 devices controlling blinds. They are the same model, on the same firmware, and configured identically (motor mode, dual momentary switch).

However:
• One device shows Auto Calibration (“Calibrate Motor”).
• The other only shows Manual calibration.

I’ve attached screenshots of both Motor Settings pages.

What determines whether Auto Calibration is available on a DUALR3? Is this related to pairing, wiring, load detection, or app-side device classification? Is there a way to re-enable it?

Thanks.