Freq Shift: not working for me in Spectrogram

[stevedee]

I set a BirdNET-Pi system up at the weekend and its working great.
I'm still finding my way around, but I don't seem to be getting the Freq Shift to work in the Spectrogram page.
It works as expected for Recordings.
Can someone confirm that is does work on current version ...and its just finger trouble here?

Freq Shift is a great feature for me as I can no longer hear high frequency calls like those of the common kingfisher.