Positive Grid BIAS Pedal and Pro-channel emulator causing issues.

A project with one audio or simple instrument track. Insert a console emulator in the pro channel as well as an FX Chain. In the FX chain I have inserted BIAS Pedal.  An undesired distortion sounds.  If I disable the FX Chain or BIAS pedal the distortion goes away. It also goes away if I disable the console emulator. While playing back if I disable the console emulator the distortion goes away even if the emulator is re-enabled. If I stop and then start playback the distortion is back.
 
Switching the order of the emulator and the FX Chain does not affect this behavior.