1.16 Pre-Release 1... It's coming...
It's not a bug, actually, when the player hasn't completed any advancement it would say "There doesn't seem to be anything here... 😞" and then when you complete one advancement it will show.
It works as intended. You need to have a crafting table in your inventory and then you'll see the advancements.
Yeah, in old versions zombies could break doors but in new versions (like 1.15) they can no longer break doors.
Hope they fix that because it kinda makes me disappointed
It has been fixed in 1.16 pre-release 1.