Zombie that is killed on fire/by lava do not drop baked potatoes

When you kill a zombie with a fire aspect sword or with lava, it doesn't drop baked potatoes, instead, it drops normal unbaked ones. This bug is fixed in the next Java snapshot (MC-199065)

Step to Reproduce
1. Spawn a lot of zombies
2. Enchant a sword with fire aspect (looting required if you want to get potatoes fast) or use lava.
3. Kill them.
---> It drops normal potatoes, not baked ones.