Tamed wolf health resets when NBT is loaded (e.g. relog)

The bug

If a tamed wolf's Health NBT is modified by the /data or /execute store commands, it is always set to 20.0f, regardless of its previous value or what it should have been modified to. This does not happen with untamed wolves, tamed/untamed cats, or tamed/untamed parrots.

How to reproduce

1. Summon a wolf

   /summon wolf

2. Tame the wolf with a bone
3. Damage the wolf by one half-heart
4. View the wolf's health

   /data get entity @e[type=wolf,sort=nearest,limit=1] Health

   → The wolf's health is 19.0f

5. Attempt to change the wolf's health to 10.0f

   /data modify entity @e[type=wolf,sort=nearest,limit=1] Health set value 10

6. View the wolf's health

   /data get entity @e[type=wolf,sort=nearest,limit=1] Health

   → The wolf's health is 20.0f, rather than the expected 10.0f