Stuck in Miner and Smelter Menu | experimental build (v0.1.0-alpha.19444)

As the title says, if running the experimental build (which aside from this issue, IMO runs better than the other versions), if you open the miner or smelter menu you cannot exit it. You must hard close the game to 'exit' the screen. The game does not freeze, you can still see and hear things happening around the menu window. But the menu is locked open and unescapable.