Keyshape animated SVG trouble

I know others have successfully used animated SVG files created in Keyshape, but I’m not able to get Blocs (v3.4.5) to show the animation unless I copy and paste the code into a code widget. I’d like to use an animated SVG file as a background in a bloc, so I can’t use a code widget. I’m hoping someone knows the trick to make it work.

NOTE: Keyshape SVG files don’t even show any animation in the Asset Manager window—unlike other animated SVG files (ie. preloaders) which appear just fine. So that tells me there is a problem with Keyshape SVG files.

Can anyone advise me how to export animated Keyshape SVG files to work better in Blocs?