Yeah, it’s weird.
It happens sometimes for me in Cubase and Nuendo, and WaveLab as well (all VST3 hosts). The plugin is all blurry until I have selected a preset in it, or passed some audio through it. But not every time. And not every time in SpectraLayers either.
Haven’t tried AU or AAX variants myself but ProTools users have reported the issue on the UA forum.