sometimes "~onDeath" was not worked.

5.5.1 [Legacy attachment omitted]

When an onDeath skill occurs, all the mobs in world are removed and messages must be sent to the player, But sometimes that skill are not triggered.

also killed messages was not printed messages in console like this case:
[00:23:14] [Server thread/INFO]: Named entity EntityVindicator['슬렌더'/573671, uuid='7bcc921b-bf97-4c80-848c-bca9333f1f23', l='ServerLevel[pve5_10]', x=245.58, y=54.00, z=-19.01, cpos=[15, -2], tl=806, v=true] died: 슬렌더 was slain by Tonkatsu_07_21 using [안드로메다 액스]