Still waiting for art to come in for the final update but until then, here's a tiny bug fix for anyone messing around with the Marble Race piece and discovering some weirdness where it wouldn't delete properly.
Pre-Live Hotfix 3
Build and release context
Steam update times within 24 hours of this post. Matching dates do not confirm which build it describes.
Build 17650943 · public branch
Steam updated · First observed