I have notice that picking up the builder ability seems to prevents you from drawing any more cards or gain any score.
Yes, it doesn't always happen, only when you have other specific cards with the builder, but this is a bug indeed. It's already fixed in the build for the next version, but updates for the game are frozen for a few more days because the game jam voting period is still ongoing. Thanks for the feedback btw!
Edit: the problem is now fixed starting from version 0.11