FTB infinity randomly closing mid session

[AlphaProphecy]

Title:

FTB infinity randomly closing mid session​

Launcher Version:

1.4.11​

Modpack:

FTB Infinity Evolved 1.7​

Modpack Version:

2.3.5​

Log Link:

http://paste.feed-the-beast.com/view/53851606​

Details of the issue:

Randomly mid game the game closes, their is no crash and no error message. The game closes and brings me back to the launcher. While in game the game also continuously auto un full screams and minecraft seems to constantly reopen in the task bar. Non of my friends receive the same issue, i have even tried using their installs of ftb on this computer and receive the same issues
I have these extra mods installed:
Mekanism
Ars Magika 2
Animation API​

 

[mc.crab]

Post the full log.

 

[AlphaProphecy]

Post the full log.

Is this what you mean?
http://paste.feed-the-beast.com/view/56d907a4
It hasn't created a crash report folder and and as shown it just exits from nowhere

 

[AlphaProphecy]

Post the full log.

Here is the error from the server
http://paste.feed-the-beast.com/view/34ddb004
I think the crash occurs when i click to fast

 

[AlphaProphecy]

My friends receive the exact same error but they do not return to the launcher, they just get kicked from the server and remain in the main minecraft client, however when it occurs, it occurs to everyone not in the LAN i.e. all connected people disconnect apart from my computer which is in my LAN. My servers firewall is set-up to accept Minecraft through it.
For me I think the crash occurs when i click to fast such as shift clicking many stacks into a AE system, or attacking a mob. I use border less gaming to border less full screen my game however the crash still occurs when I'm in standard full screen. When i do click too fast the game can become unresponsive and a black box appears and disappears instantly in the top left of my screen which sometimes un-focuses minecraft.
For my friends could my isp/router be periodically removing minecraft traffic causing them all to disconnect I have run vanilla minecraft servers in the past and received no errors, however that was a long time ago and maybe something has changed,