Zombie with a name despawns

In 1.14.3 I built an iron golem farm which depended on a zombie being present, so I used a name tag to ensure he didn't despawn.  In 1.14.4, the zombie despawns even with the name.

 
I have tried this with zombies, named with nametags, and zombies spawned in through commands, and they all despawned when i went far away.