fix bug with leavin game while knocked

src/main/java/net/fretux/knockedback/KnockedManager.java

@@ -16,6 +16,7 @@ import net.minecraftforge.eventbus.api.SubscribeEvent;
 import net.minecraftforge.fml.common.Mod;
 import net.minecraftforge.network.PacketDistributor;
 import net.minecraftforge.event.entity.player.PlayerEvent;
+import net.minecraftforge.event.entity.player.PlayerEvent.PlayerLoggedOutEvent;
 import net.minecraftforge.registries.ForgeRegistries;
 
 import java.util.*;
@@ -25,20 +26,15 @@ public class KnockedManager {
     private static final Map<UUID, Integer> knockedEntities = new HashMap<>();
     private static final Set<UUID> grippedEntities = new HashSet<>();
     private static final Set<UUID> killingNow = new HashSet<>();
-
     public static void markKillInProgress(LivingEntity e) {
         killingNow.add(e.getUUID());
     }
-
     public static void unmarkKillInProgress(LivingEntity e) {
         killingNow.remove(e.getUUID());
     }
-
-
     public static int getKnockedDuration() {
         return Config.COMMON.knockedDuration.get();
     }
-
     public static void applyKnockedState(LivingEntity entity) {
         if (!(entity instanceof Player)) {
             return;
@@ -224,6 +220,18 @@ public class KnockedManager {
         );
     }
 
+    @SubscribeEvent
+    public static void onPlayerLoggedOut(PlayerLoggedOutEvent event) {
+        if (!(event.getEntity() instanceof ServerPlayer sp)) {
+            return;
+        }
+        if (!isKnocked(sp)) {
+            return;
+        }
+        killAndRemove(sp);
+    }
+
+
     private static void applyKnockedEffects(Player player) {
         List<? extends String> configured = Config.COMMON.knockedPotionEffects.get();
         Map<MobEffect, MobEffectInstance> desiredEffects = new HashMap<>();