Player's movement update doesn't work properly

[FakieSui]

Issue description

When a player gets hurt by another one against a block, the movements doesn't update properly : what is displayed on the attacker screen is not the same as the victim screen

Steps to reproduce the issue

1. Open 2 MCPE Clients
2. Connect on your personal server
3. Put player n°1 against a block
4. Hit player n°1 in the direction of this block using player n°2
5. Due to the knock-back, player n°1 will go up and fall down on the block he was before (normal)
6. On the other hand, which is STRANGE, player n°2 will see that player n°1 climbed and stands on the block he was against (see the pictures it will be more understandable)

OS and versions

• Genisys: c19e850
• PHP: 7.0.3
• Server OS: Ubuntu 15.04 (LTS)
• Game version: 0.15.6

Crashdump, backtrace, memory dumps, plugins list or other files

See pictures

[FakieSui]

Any news for that? Still occurs with the latest Genisys Build in 0.16.5