Boss VF-1 Effect Processor

I'm really bummed that one of the rear inputs deactivates when you 
plug anything into the High-Z input on the front.  Now I can't leave 
my VF-1 plugged into my mixer in an fx loop AND have my guitar 
plugged into the front.  I have to keep plugging and unplugging the 
guitar. 

Does anyone know of a way around this?

Thanks,

LAVA