[Darryl Ramm]

With the Eleven Rack selected as an interface it should mute the internal monitoring path so you should not be hearing the rig directly, only what is being monitored through Pro Tools.

You either are seeing a known occasional bug where the internal monitoring path is not being suppressed correctly. You can find other posts about that issue on DUC. Try an older driver version. Look at other posts here.

Or you simple don't have the Eleven Rack selected as the playback engine... this is a highly likely explanation. You have to *check* what is selected. And not an aggregate device.

Or you accidentally have the wet source selected as input in a track or maybe in another hidden track. It's unlikely but you can also check that the input labels for the interface are not messed up. After checking the Eleven Rack is select4ed as the playback engine then select and delete all setup>IO>input paths and click the default button.