Driven mic'd guitar amps monitored through the UR242 headphone Jack sounds buzzy

Steinberg Hardware UR Series
#1

My mic’d Fender Reverb Deluxe amp sounds great through the Steinberg UR242 headphone jack as long as the guitar sound is clean. As soon as I add a little overdrive to the amp, the sound in the UR242 headphone jack gets all buzzy. Setup includes:

Amp: Fender Reverb Deluxe
Stereo Recording Isolation Cabinet
Mic 1: Shure SM57
Mic 2: Sennheiser e906
16-ohm headphones, closed back
30-ohm Philips Audio Fidelio X2HR open back headphones
250 -ohm Beyer DT770 Pro headphones, closed back

Any way to correct this?

#2

How is the gain structure?
Do you listen direct or via daw?
How is the dspmixfx set up?
How does the guitar sound recorded?