Bug: Parallax cab settings don't actually do anything

I’ve had Parallax since it was released, and I just realized today that changing any settings on the cab - mic, placement, distance, etc. - doesn’t actually change the sound. Weird. Usually it’s a pretty obvious change when you drag the mic around different spots, but there’s literally no audible difference. Same when I change mics.

Just confirming: yes, the cab block is enabled. Yes, the mics are enabled. No, I don’t have an external IR loaded. Yes, I can hear an audible difference between when I have the cab enabled and disabled.

Anyone else experiencing this?