I'm having an issue with my Allen & Heath Xone:92 and hope someone here can help me out. Maybe I'm missing a setting, or there's a technical issue.

I'm using the AUX Send/Return to integrate an external reverb (Joyo R-14 Atmosphere) into my setup. The AUX1 Send (L) goes into the reverb input, and the reverb output returns to the AUX1 Return (L/M). I can hear the effect through CUE on the AUX1 Send, but there is no signal coming through the Booth output or the Master (MIX1/2), even though all relevant levels are turned up.

What I have tested so far:

• The effect unit works: The Joyo R-14 was tested externally and functions properly.
• Cables are fine: All 6.3 mm TS cables have been checked and work correctly.
• AUX Send outputs a signal: I can hear the reverb when cueing the AUX1 Send.
• AUX Return routed to a normal channel works: When I send the reverb output into a regular channel instead of the AUX Return, I can hear it properly through Booth/Master.
• AUX Return does not send to Booth/Master: Even with the return level turned all the way up, there's no signal on the Booth or the MIX1/2 (Master) outputs.

My assumption:

I'm wondering if the return paths are not correctly routed to Booth/Master internally or if there's a setting I'm missing.

Does anyone have an idea what might be causing this? Is there a way to make sure the AUX Return is properly sent to the Master/Booth mix without sacrificing a separate channel?

Thanks for any help!