HX Stomp / Edit - effects in split path creates an out-of-phase effect?

[johnwnyc]

I'm building an effects loop so that I can experiment with dry/wet mixes.

 

When I drop my FX Loop into a separate path, I hear a distinct phaser effect. The only pedal in the loop at the moment is a Strymon Flint with a low reverb.

 

Any ideas what might be causing this?

 

I have a Split Y in the front, 50/50 Balance A-B, and the Mixer is at Center 0.0 dB.

[rd2rk]

You've got the FX Loop itself introducing latency, and a digital effect that adds even more latency, being mixed with the direct signal on path A.

To prove that as cause, eliminate the split by moving the FX Loop to path A.