I'm not sure if this is a Roll20 issue or a user error, but I find the compendium drag-and-drop (for monsters) either buggy or non-intuitive. is there a how-to guide somewhere that I'm missing? Basically i'm just trying to look up monsters/creatures, drag them to the tabletop, and use them quickly. but I find that they often don't appear at all; or if they do appear they're missing all the information and token - just a weird white square with a stick figure outline.