bug MythicMobs

MythicMobs 5.0.4 Model Engine r2.5.2 Paper 379 server Fabric 1.18.2 client Toxic's https://www.mc-market.org/resources/22797/ We want to spawn the boss away from the players so that the players randomly find it in the world. We already spoke with Toxic, he tried to help, but could not deal with this bug. He suggested changing the "despawn" setting. It didn't change anything