While debugging a different “right eye issue” I’ve encountered additional clues to this one (although I can’t determine the why yet).
When using Windows Mixed Reality as the OpenXR Runtime with an HR Reverb G2, the issue presents at screen percentages >80%, BUT when using a SteamVR as the OpenXR Runtime with a VIVE Pro, the issue only persists when “supersampling” with screen resolutions >100%