This is not resolved if it's not fixed. It's pretty annoying in 1.13.2.
It seems it could be related to my bug, but I do not understand the inconsistency where I have had zombies go through wooden doors but that attachment demonstrates they do not.
I am not sure about that either. I can't speak for passive mobs, but I've had skeletons and creepers walk through (open) wood and iron doors to get me. It's only adult zombies that I've seen absolutely refuse to pursue me through an open iron door (single or double). Not only that, but once I am through the open door, they forget I exist and walk off to other targets (villagers).
In 1.14 Pre-Release 2, there are only a handful of lily pads in an entire swamp. That isn't right!