Can't pan mono tracks [fixed]

[Gregarious_Gus]

Hi! I can’t seem to pan a guitar track (‘tele57’) with the little panning widget. When its in the center position, I have 100% in both L/R. When I pan full left, I still have 100% in both L/R. But when I pan hard right, I lose all sound in both L/R.

This is a mono guitar track (‘stem’) imported recorded elsewhere. I used in 2020 in Ardour (v5? or v6? Dunno) and if now open that project I can easily pan the track and get behavior I expect.

There are a lot of changes since 2020, notably I’m now running an Ardour built from source (‘Ardour 9.0.rc2.41’) on Arch Linux, and using a brand new Moto M2 USB sound interface.

Can anyone advise?

Thank you!

[Gregarious_Gus]

Ok, I figured things out. I’ll show you my broken routing state below.

I didn’t realize if I resized the window to a larger (wider) size), it would uncover /reveal the right channel.