Raid waves don't load, causing the raid to never end unless new pillagers are spawned and killed

2 players on a LAN world. Player 2 (not the host), kills a wild raid party member with a banner, getting a bad omen effect. We then go to a village and start a raid. Wave one finishes and the bar loads up, but no raid members spawn. I tried to see if they were there by trying to apply glowing to them, but no entities were found. We had to fix this by going to creative and spawning and killing pillagers, which took a LONG time. After this the raid continued normally.