This is still in 1.14.4. A few friends and I have a multiplayer realm and have had named zombie pigmen respawn from our gold farm on top of the nether. I have named some with name tags and renamed spawn eggs on an anvil. I had one of my friends tonight the farm and I used spectator mode to watch the pigmen. One by one, most despawned in a few minutes.
Couldn't this be fixed by downsizing the size of the pixels on the shield to make it the same amount of pixels as a shield. I'm on a server and we all have our own banner design and want to put them on our shields, but they look nothing like the banners. Please fix soon