Pillager Captain does not give player Bad Omen when killed

Me and my friends have decided to make an afk raid farm and we have noticed that the pillagers are spawning in random places and we are having trouble trying to fix that. But besides that, our main issue is Pillager Captains; when we spot a raid party in the distance we rush to take them out. Once we take out the Captain's companions and finish the job by killing the captain, It doesn't give us Bad Omen and this has been happening for 3 or so days now and this happens with every Captain we come across. We don't know if it is because of the mods I installed on to the realm. But they are relatively harmless ones that shouldn't affect pillagers because they are stuff like; funny death messages, random treasure chests, Upgradeable Villager mod (allows the player to give a villager stuff like weapons to help attack mobs), and a Battle Tower add on (Which we removed because it didn't work) and we even removed all the mods and made a copy of the realm without any mods and it didn't even change a thing! The Pillager Captains still didn't give us Bad Omen. We really could use some help.