Multiplayer issues with lag producing differences through time between devices

[AdamN]

This also happened on Naruto Kizuna Drive as i remembered when i tested it on localhost with simulated high latency (200ms) and high packet loss rate (25%) in the past, overtime the position of the characters became different on both screen even though initially they were in sync.

It felt like the game was sending the position data in difference/relative instead of absolute coordinate, or it only send "actions" (ie. pressed keys, etc.) and calculate the position based on those actions, thus the accumulated final position can be different when there are too many lost packets (ie. desync) overtime.
There is also a possibility of timing issue causing the position to become desync overtime, but simulated high latency or high packet loss rate was significantly affecting the desync as i remembered (ie. doesn't need to wait too long before it started to become noticeable)