No scroll in terminal under i3wm

I’m ashamed to admit I can’t figure this out. The default terminal in use in the i3wm install appears to be xfce-terminal but I cannot scroll back in any of the terminals even though it is set for unlimited scrollback in the terminal settings. Can anybody please tell me what I’m missing?

EDIT: After paying a little more attention, I realize this only happens when I’m connected to another system via mosh. Even regular SSH doesn’t have the scroll issue.

no issue here on different i3 installs