If you build something like in the screenshot below (notice, that the door is actually closed, because 'opened' is false), and spawn a mob (for example, Zombie), it won't be able to walk through, even though players can (it also affects every other mob). I checked it in vanilla - still the same. Also, it affects 1.19.* versions (i cant pick them, I dont know why). (Java)
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It affects all other mobs (tried it with Skeleton and Creeper, still they can't go through)
Can reproduce in 1.20.3 Pre-Release 1
Relates to MC-181565