Auto refresh rate

Hi I have an OG shield TV and a new 2019 shield.
Both on same OS
Both on same Channels DVR app.

My 2019 shield has the option to switch on auto refresh rate but my OG shield doesn't?

Any reason why?

Cheers

Please submit diagnostics from both

Done!

Looks like one is set to en_US and the other en_GB. The frame rate matching feature is only for UK so your device must be set to the UK English locale.

Great thanks never would of worked that one out haha!!