Change PlayerMovementMapper to a handler and fix the mappings so it works.

src/main/java/us/myles/ViaVersion/protocols/protocol1_9to1_8/PlayerMovementMapper.java

@@ -2,14 +2,10 @@ package us.myles.ViaVersion.protocols.protocol1_9to1_8;
 
 import us.myles.ViaVersion.api.PacketWrapper;
 import us.myles.ViaVersion.api.remapper.PacketHandler;
-import us.myles.ViaVersion.api.remapper.PacketRemapper;
 import us.myles.ViaVersion.api.type.Type;
 import us.myles.ViaVersion.protocols.protocol1_9to1_8.storage.MovementTracker;
 
-public class PlayerMovementMapper extends PacketRemapper {
-    @Override
-    public void registerMap() {
-        handler(new PacketHandler() {
+public class PlayerMovementMapper extends PacketHandler {
     @Override
     public void handle(PacketWrapper wrapper) throws Exception {
         MovementTracker tracker = wrapper.user().get(MovementTracker.class);
@@ -19,6 +15,4 @@ public class PlayerMovementMapper extends PacketRemapper {
             tracker.setGround(wrapper.get(Type.BOOLEAN, 0));
         }
     }
-        });
-    }
 }

src/main/java/us/myles/ViaVersion/protocols/protocol1_9to1_8/packets/PlayerPackets.java

@@ -443,6 +443,52 @@ public class PlayerPackets {
             }
         });
 
+        // Player Position Packet
+        protocol.registerIncoming(State.PLAY, 0x04, 0x0C, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.DOUBLE); // 0 - X
+                map(Type.DOUBLE); // 1 - Y
+                map(Type.DOUBLE); // 2 - Z
+                map(Type.BOOLEAN); // 3 - Ground
+                handler(new PlayerMovementMapper());
+            }
+        });
+
+        // Player Move & Look Packet
+        protocol.registerIncoming(State.PLAY, 0x06, 0x0D, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.DOUBLE); // 0 - X
+                map(Type.DOUBLE); // 1 - Y
+                map(Type.DOUBLE); // 2 - Z
+                map(Type.FLOAT); // 3 - Yaw
+                map(Type.FLOAT); // 4 - Pitch
+                map(Type.BOOLEAN); // 5 - Ground
+                handler(new PlayerMovementMapper());
+            }
+        });
+
+        // Player Look Packet
+        protocol.registerIncoming(State.PLAY, 0x05, 0x0E, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.FLOAT); // 0 - Yaw
+                map(Type.FLOAT); // 1 - Pitch
+                map(Type.BOOLEAN); // 2 - Ground
+                handler(new PlayerMovementMapper());
+            }
+        });
+
+        // Player Packet
+        protocol.registerIncoming(State.PLAY, 0x03, 0x0F, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.BOOLEAN); // 0 - Ground
+                handler(new PlayerMovementMapper());
+            }
+        });
+
         /* Packets which do not have any field remapping or handlers */
 
         protocol.registerIncoming(State.PLAY, 0x01, 0x02); // Chat Message Packet
@@ -451,9 +497,6 @@ public class PlayerPackets {
 
         protocol.registerIncoming(State.PLAY, 0x00, 0x0B); // Keep Alive Request Packet
 
-        protocol.registerIncoming(State.PLAY, 0x04, 0x0C, new PlayerMovementMapper()); // Player Position Packet
-        protocol.registerIncoming(State.PLAY, 0x06, 0x0D, new PlayerMovementMapper()); // Player Move & Look Packet
-        protocol.registerIncoming(State.PLAY, 0x05, 0x0E, new PlayerMovementMapper()); // Player Look Packet
-        protocol.registerIncoming(State.PLAY, 0x03, 0x0F, new PlayerMovementMapper()); // Player Packet
+
     }
 }