So I came across some random disconnections while playing my Kaiser for a while now; but every disconnect I've had was pretty much tied towards our Majesty hyper skill.
So since I came across this, I decided to do a bunch of tests; involving using SI/no SI and different stages of the morph gauge and two different weapons with different attack speeds.
When you use Majesty, if Majesty pushes you past the fast 2 speed cap (the skill bringing you to fast 1 or 0 attack speed) and you attack when Majesty is about to disappear, you will disconnect from the game.
I just thought I'd post this for others to see as a heads up; it might help avoid some issues and unnecessary stress. Oh, you won't disconnect when you're transfigured since it's currently set to a fixed attack speed; wingbeat and your summon will not trigger a disconnect, but your other attacks will.
As for a solution until it's fixed; just avoid attacking when Majesty is about to end if you surpass the fast 2 attack speed cap.
EDIT: This has been fixed as of the Cygnus Awakens patch.