fix(pocket-base): clear fall distance after portal travel

src/main/java/games/dmg/spigotbase/PocketBaseController.java

@@ -289,6 +289,7 @@ final class PocketBaseController implements Listener, Runnable {
 
     private void teleport(Entity entity, Location destination) {
         cooldownUntil.put(entity.getUniqueId(), System.nanoTime() + PORTAL_COOLDOWN_NANOS);
+        entity.setFallDistance(0.0F);
         entity.teleport(destination, PlayerTeleportEvent.TeleportCause.PLUGIN);
     }
 

src/test/java/games/dmg/spigotbase/PocketBaseControllerTest.java

@@ -26,6 +26,7 @@ import org.bukkit.entity.Player;
 import org.bukkit.event.block.Action;
 import org.bukkit.event.block.BlockPlaceEvent;
 import org.bukkit.event.player.PlayerInteractEvent;
+import org.bukkit.event.player.PlayerMoveEvent;
 import org.bukkit.event.player.PlayerTeleportEvent;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.util.BoundingBox;
@@ -310,6 +311,37 @@ final class PocketBaseControllerTest {
         );
     }
 
+    @Test
+    void voidReturnClearsAccumulatedPlayerFallDistance() {
+        UUID ownerId = UUID.randomUUID();
+        UUID pocketWorldId = UUID.randomUUID();
+        World pocketWorld = mock(World.class);
+        World fallbackWorld = mock(World.class);
+        Location destination = new Location(pocketWorld, 0.5, -65.0, 0.5);
+        Location spawn = new Location(fallbackWorld, 10.5, 70.0, 10.5);
+        Player player = mock(Player.class);
+        PlayerMoveEvent event = mock(PlayerMoveEvent.class);
+        PocketBaseManager pocketBases = mock(PocketBaseManager.class);
+        Server server = mock(Server.class);
+
+        when(pocketWorld.getUID()).thenReturn(pocketWorldId);
+        when(player.getUniqueId()).thenReturn(UUID.randomUUID());
+        when(event.getPlayer()).thenReturn(player);
+        when(event.getTo()).thenReturn(destination);
+        when(server.getWorlds()).thenReturn(List.of(fallbackWorld));
+        when(fallbackWorld.getSpawnLocation()).thenReturn(spawn);
+        when(pocketBases.ownerForPocketWorld(pocketWorldId)).thenReturn(Optional.of(ownerId));
+        when(pocketBases.state(ownerId)).thenReturn(
+            new PocketBaseState(ownerId, 1, Optional.empty())
+        );
+        PocketBaseController controller = controller(server, pocketBases);
+
+        controller.onMove(event);
+
+        verify(player).setFallDistance(0.0F);
+        verify(player).teleport(spawn, PlayerTeleportEvent.TeleportCause.PLUGIN);
+    }
+
     @Test
     void mobReturnFallsBackToServerSpawnWithoutValidEntrance() {
         UUID ownerId = UUID.randomUUID();