After updating to 1.14.3, no (most) hostile mobs that naturally spawn are spawning. Creepers, Spiders, Zombies, Guardians, are not spawning. Meanwhile, spawners still work, Phantoms still spawn after several nights, Elder Guardians still spawn in ocean monuments, pillager patrols still spawn, and raids still happen. The End and the Nether have normal spawn rates, not affected at all. I've tried making copies of my world and trying the new 1.14.4 pre-releases, and the issue still exists. Thank you for your time.

PS Zombie Pigmen getting aggro-ed by skeletons shooting them is REALLY annoying lol.