The second issue apeared after the last Plasmic update. I created a custom code component which uses SVG paths as a mask for an image. At the end nothing fancy. I get this info in the component panel and a squared image in the editor but not the shaped one which is visible on the actual page. I use className on the component but still get this info about it missing.
The info about the className prop I fixed it with the help of this comment 
the issue about not displaying the shape of the image in the editor is still happening.