The bug

If a warden gets angry at a zombie villager, and said zombie villager transforms into a villager before the warden can kill it, the warden will not remain angry at this villager and will need to become aggressive toward it a second time.

How to reproduce

1. Create an enclosure protected by sunlight
2. Spawn a zombie villager inside
3. Obtain this zombie villager's UUID (e.g. by typing "/data merge entity " while looking at it and then pressing Tab)
4. Summon in a warden
5. Have the warden get angry at the zombie villager
6. Run the command "/data merge entity UUID {ConversionTime:1}

   ", replacing UUID with the entity's actual UUID

Expected results

The warden would remain angry even when the targeted zombie villager becomes a villager.

Actual results

It loses its target.