The Bug

In Minecraft 1.14.1, when you shoot a pillager leader with a power 5, flame bow, the pillager is knocked down to 5 hit points.  The damage from the flame is enough to kill it, but the player does not receive the bad omen effect. When testing this with a normal power 5 bow, it takes 2 shots to kill the pillager, and gives the player a level of the bad omen effect. After killing several leaders, you only receive the effect when you do the last hit point of damage.  

To Repeat:

• Summon/find a pillager with the banner.
• /give @p bow
• /enchant @p power 5
• /enchant @p flame
• Draw the bow fully back, and then shoot the pillager once.  It will be knocked down to 5 health, and then will die from fire damage.  The player does not receive the bad omen effect.

Observed Behavior:

The bad omen effect isn't granted when pillager captains die from the effects of flame or fire aspect enchantments after being attacked by players.

Expected Behavior:

The bad omen effect would be granted when pillager captains die from the effects of flame or fire aspect enchantments after being attacked by players.