[Darryl Ramm]

OK so this is only an issue when monitoring....

Unfortunately what you are seeing is how the Eleven Rack misbehaves with/was never really designed to work with third part DAWs.

The Eleven Rack has an internal monitoring path, essentially what you hear when playing guitar through it stand alone. Pro Tools mutes that internal
Path when using the Eleven Rack. Other DAWs do not do know how to do that, and Avid don’t provide a manual way to do that (they should). So you are hearing the normal DAW and this separate direct monitoring path audio.

So folks either track with Pro Tools, or mute the software monitoring in the DAW so they only hear the guitar over the Eleven Rack direct monitoring path, or they handg the Eleven Rack as an outboard processor off a larger interface (ideally via S/PDIF or AES/EBU) with that interface driving the monitors.

BTW if you play with Pro Tools First one other option that opens up is the entire suite of Eleven Rack amp sims and effects are available as plugins which lets you revamp etc. all in software. And these are all included inin the complete plug-in bundle that is ~$50/year. I am actually not a big fan of First and would encourage folks to skip to standard Pro Tools, but I am a big fan of the Rkeven Rack and the matching plugins.