The Sims 1 Legacy Collection: Black screen issue (not crashing)

Playing it on Steam, with the Feb 6th update.

When opening up The Sims 1, the screen turns completely black and will remain stuck like this (I've tried waiting for over 10 minutes). Clicking or typing does nothing.

However, if I press "Alt" + "Tab" to tab out and back into the game, the loading music plays, and the town map appears soon after. The game is fully playable after that, though I'm needing to press Alt + Tab every time I boot up the game.

I've attached a DxDiag output.