Fix wrong flags in MoveEntityAbsolutePacket + set onGround

CHANGELOG.md

@@ -18,6 +18,7 @@ Click the link above to see the future.
 - [#228] Invalid enchantment order on anvil's results causing the crafting transaction to fail.
 - [#226] Anvil cost calculation not applying bedrock edition reductions
 - [#222] Anvil changes the level twice and fails the transaction if the player doesn't have enough.
+- [#235] Wrong flags in MoveEntityAbsolutePacket
 
 ## [1.2.0.0-PN] - 2020-05-03 ([Check the milestone](https://github.com/GameModsBR/PowerNukkit/milestone/6?closed=1))
 **Note:** Effort has been made to keep this list accurate but some bufixes and new features might be missing here, specially those made by the NukkitX team and contributors.
@@ -194,3 +195,4 @@ Click the link above to see the future.
 [#224]: https://github.com/GameModsBR/PowerNukkit/pull/224
 [#226]: https://github.com/GameModsBR/PowerNukkit/issues/226
 [#228]: https://github.com/GameModsBR/PowerNukkit/issues/228
+[#235]: https://github.com/GameModsBR/PowerNukkit/issues/235

src/main/java/cn/nukkit/level/Level.java

@@ -3459,6 +3459,7 @@ public void addEntityMovement(Entity entity, double x, double y, double z, doubl
         pk.yaw = (float) yaw;
         pk.headYaw = (float) headYaw;
         pk.pitch = (float) pitch;
+        pk.onGround = entity.onGround;
 
         Server.broadcastPacket(entity.getViewers().values(), pk);
     }

src/main/java/cn/nukkit/network/protocol/MoveEntityAbsolutePacket.java

@@ -46,10 +46,10 @@ public void encode() {
         this.reset();
         this.putEntityRuntimeId(this.eid);
         byte flags = 0;
-        if (teleport) {
+        if (onGround) {
             flags |= 0x01;
         }
-        if (onGround) {
+        if (teleport) {
             flags |= 0x02;
         }
         this.putByte(flags);