This may or may not be a bug, but people should be aware of it. It's happened to me in various settings and decks.

Assume you have 1 domain, which is your default domain/building base, say a graveyard. You've also got some dank pits in your deck (base, with 1 domain casting requirement). If you that graveyard gets taken out, the game will see that you're missing a base and put the first pit or graveyard next to draw. However, it does this before it realizes you lost that 1 domain which is necessary to cast the pit. So you'll usually wind up with a pit and no domain to cast it and then have to wait another turn to get your graveyard/other domain building so that you can start casting things again.

Looks like a bug. Actually you draw new card (and autodraw too) at start of round when your building already destroyed and if you have no bases autodraw should give you playable base.

Ok, so this is getting kinda annoying.. It's been a while since I've played another kind of deck, so I don't know if it applies universally. but I do know that when a vapor mahal destroys itself it treats it like you still have the domain for autodraw purposes. so you get the have-to-wait-two-turns thing to pull a domain building