Loss of Stereo with External Effects

Hi,

Set up devices with External Effects as stereo device with sends on Lines 3 and 4, returns on inputs 7 and 8. Ran signal from outs 3 and 4 to outboard eq and compressor, back into 7 and 8. Inserted as an effect on the main stereo output.

I noticed I lost stereo. I pan all the way left or right, and the signal still comes through both speakers. When I bypass the external effect, the ability to pan comes back, and I’m back in stereo.

Any ideas? Thanks!

Running N7 on Windows 10 with Apollo Twin and Audient 880…The Apollo has the Lines 3 and 4 outputs, the Audient has the inputs of 7 and 8…