EDIT: It seems I have come across a fix for massive desync's (At least for me).
I run a UTM gateway called UTM 9 by Sophos and came across something that has relived my desync altogether. Now during a normal and desync gameplay there are UDP packets sent from the server to the client in MASS causing a UDP Packet Flood, during this flood of incoming data, my gateway sees this as a potential threat and stops it at the door on UDP ports 2302-2305, (This method was tested during a 100k desync) while I was desynced I went into UTM9 checked Anti-DoS and Flooding real time logs and watched my firewall/gateway block everything on those ports.
After everything was confirmed that UTM 9 was blocking these packets from the server, I proceeded to add an exception to skip UDP Anti-DoS/Flooding on ports 2302-2305 within Intrusion prevention. Once the exception rule was added my desync cleared up and I was able to play again.
Now for people who do not have UTM 9 and have a standard router/firewall, you may need to look to see if you have any kind of anti-DoS/flooding control and create an exception for those ports explained above.
I hope this help everyone who is having these desync problems.
OLD: I've been having these odd desync issues with one or more of my friends on steam.
We have been rolling in a group of seven to eight with no problems for the last few days, but this problem has come around before.
What happens is I log on a server, do what I need to do, no problems, have a few friends log on, no problems. Then certain friends start to log on and I can't do anything, but they can without a problem.
Now this only happens when I am in there network bubble within the server, if I go outside of this bubble I have full use of everything, but once I get near my friend I can't do anything, but the other six or seven are functioning just fine.
We have tested this over and over, and the person changes without any kind of pattern, only way we figure out who is causing the problem is standard elimination of having people log out while I am in the area.
These desync problems are a real pain in the ass and I have tried everything from changing my IP, restarting steam, disabling my UTM9 gateway, doing complete bypass's straight to the modem, so far it comes down to it's not my network, but something on the DayZ server/Hive that is causing these huge desync's while in the same network bubbles.