Why are my widgets gone?

I just noticed all of the arranged widgets I added to my second monitor have vanished. I spent a decent amount of time configuring everything and they are simply gone. Restarting does not bring them back. Widgets are enabled in my Desktop & Dock settings, and have been all along. Is there anyway to get them back? Does anyone know what triggers their removal? It's not worth using them if they don't persist. Any thoughts or suggestions?