Dropped Items Getting Duplicated

[ghost]

Issue description

The items get duplicated when dropped on the ground.

Steps to reproduce the issue

Pocket Mode:

1. Hold an item in the Hotbar and try to drop it on the ground. Classic Mode:
2. Throw an item by clicking outside of the inventory border and clicking there.

To test,

1. Pick it up.

OS and versions

• Nukkit Version: since commit #1e9729dc400691a6e3693dd984818dbc714fefd4

• Java Version: 1.8.0_131

• Host OS: Windows x64

• Host Configuration: 4 GB RAM, i5-3210M core CPU from Intel, over local hotspot

• Client Edition: Android 5.1.1

• Client Version: 1.1.0.55

• Built Over CircleCI

  Crashdump, backtrace or other files

  server.log:

  
  2017-6-22 23:53:30 [INFO] Welcome! Please choose a language first!
  2017-6-22 23:53:30 [INFO] eng => English
  2017-6-22 23:53:30 [INFO] chs => 中文（简体）
  2017-6-22 23:53:30 [INFO] cht => 中文（繁體）
  2017-6-22 23:53:30 [INFO] jpn => 日本語
  2017-6-22 23:53:30 [INFO] rus => Pyccĸий
  2017-6-22 23:53:30 [INFO] spa => Español
  2017-6-22 23:53:30 [INFO] pol => Polish
  2017-6-22 23:53:30 [INFO] bra => Português-Brasil
  2017-6-22 23:53:30 [INFO] Welcome! Please choose a language first!
  2017-6-22 23:53:30 [INFO] eng => English
  2017-6-22 23:53:30 [INFO] chs => 中文（简体）
  2017-6-22 23:53:30 [INFO] cht => 中文（繁體）
  2017-6-22 23:53:30 [INFO] jpn => 日本語
  2017-6-22 23:53:30 [INFO] rus => Pyccĸий
  2017-6-22 23:53:30 [INFO] spa => Español
  2017-6-22 23:53:30 [INFO] pol => Polish
  2017-6-22 23:53:30 [INFO] bra => Português-Brasil
  2017-6-22 23:53:30 [INFO] kor => 한국어
  2017-6-22 23:53:30 [INFO] ukr => Українська
  2017-6-22 23:53:30 [INFO] deu => Deutsch
  2017-6-22 23:53:30 [INFO] ltu => Lietuviškai
  2017-6-22 23:53:30 [INFO] idn => Indonesia
  2017-6-22 23:53:35 [INFO] Loading nukkit.yml...
  2017-6-22 23:53:35 [INFO] Loading server properties...
  2017-6-22 23:53:35 [INFO] Selected English (eng) as the base language
  2017-6-22 23:53:35 [INFO] Starting Minecraft: PE server version v1.1.0
  2017-6-22 23:53:36 [INFO] Opening server on 0.0.0.0:19132
  2017-6-22 23:53:36 [INFO] This server is running Nukkit version 1.0dev "蘋果(Apple)派(Pie)" (API 1.0.0)
  2017-6-22 23:53:36 [INFO] Nukkit is distributed under the LGPL License
  2017-6-22 23:53:36 [INFO] Successfully loaded 0 resource packs
  2017-6-22 23:53:37 [NOTICE] Level "world" not found
  2017-6-22 23:53:37 [INFO] Preparing level "world"
  2017-6-22 23:53:37 [INFO] Starting GS4 status listener
  2017-6-22 23:53:37 [INFO] Setting query port to 19132
  2017-6-22 23:53:37 [INFO] Query is running on 0.0.0.0:19132
  2017-6-22 23:53:37 [INFO] Default game type: Survival Mode
  2017-6-22 23:53:37 [INFO] Done (7.192s)! For help, type "help" or "?"
  ...
  2017-6-22 23:57:55 [NOTICE] Player data not found for "esdmr", creating new profile
  ...
  2017-6-23 00:14:46 [INFO] esdmr[/192.168.201.2:33212] logged in with entity id 2 at (world, 128.0, 45.7344, 128.0)
  2017-6-23 00:14:47 [INFO] esdmr joined the game
  2017-6-23 00:14:48 [INFO] [CONSOLE: Set esdmr's game mode to Creative Mode]
  ...
  2017-6-23 00:19:25 [INFO] [esdmr: Turned on world auto-saving]
  2017-6-23 00:19:31 [INFO] [esdmr: Saving...]
  2017-6-23 00:19:32 [INFO] [esdmr: Saved the world]

** Duplication Happens Here

2017-6-23 00:22:40 [INFO] [CONSOLE: Changing to clear weather] 2017-6-23 00:45:42 [INFO] esdmr left the game 2017-6-23 00:45:42 [INFO] esdmr[/192.168.201.2:33212] logged out due to Kicked by admin. 2017-6-23 00:45:42 [INFO] [CONSOLE: Kicked esdmr from the game]

[yescallop]

If issue still exists, please go to the original repository (https://github.com/Nukkit/Nukkit) to ask for help.