Audio glitches/stutters when NDSP plugin is in Stereo mode

I’m using Archetype Gojira X in my DAW (Reaper) and it works perfectly fine, until I set it to the stereo mode for my left and right rhythm channels. All the audio coming from Reaper, not just the track with the plugin, starts glitching/stuttering. Any idea what’s causing this? I’d like to be able to use the stereo mode