I took a quick look, was able to repro, but did an analysis in Classic to essentially copy those two polygons (Find Existing Locations using where area greater than 0). The resultant analysis layer works just fine in Map Viewer. So, that leads me to think it might be something amiss with the geometry.
You didn't mention how you created the layer, but I'd start looking there. Pro has a repair geometry geoprocessing tool that should also fix the issue.