Hoglin pathfinding seems to break in certain circumstances. See attached videos / world file.
MC-184412 Hoglins naturally spawning on slabs. being immobile
MC-185312 Hoglins do not pathfind correctly
MC-172221 Hoglins, zoglins, ravagers, iron golems, and polar bears won't walk down a block if they are partially walking on air
MC-178458 Hoglins have difficulty walking up a block