mob desync issue

src/engine/server/world/WorldServer.java

@@ -247,20 +247,24 @@ public class WorldServer {
 				nextWareHousePushTime = LocalDateTime.now().plusMinutes(15);
 			}
 
-			switch(LocalDateTime.now().getHour()){
-				case 0:
-				case 4:
-				case 8:
-				case 12:
-				case 16:
-				case 20:
-					for(Mob dropper : Mob.disciplineDroppers) {
-						if (!dropper.isAlive()) {
-							Zone.respawnQue.add(dropper);
-						}
-					}
-					break;
 
+			if(LocalDateTime.now().isAfter(nextDiscSpawn)) {
+				switch (LocalDateTime.now().getHour()) {
+					case 0:
+					case 4:
+					case 8:
+					case 12:
+					case 16:
+					case 20:
+						for (Mob dropper : Mob.disciplineDroppers) {
+							if (!dropper.isAlive()) {
+								Zone.respawnQue.add(dropper);
+							}
+						}
+						break;
+
+				}
+			nextDiscSpawn = nextDiscSpawn.plusHours(1);
 			}
 			ThreadUtils.sleep(50);
 		}