Killing a Breeze doesn't drop XP orbs

When killing a Breeze, no XP orbs are dropped.

Querying the players' experience levels and points show a difference (before: 5 levels, 1 point, after killing 2 Breeze: 5 levels, 12 points), but there are no orbs on the ground can could be picked up.

May be related to MC-266445? Not registering as a player kill?