Kaiser d/cing issue

Describe the problem. Be as specific as possible!:
If i keep attacking for a period of time I'll d/c. This ranges from 5 seconds to 5 minutes of attacking. Seems to happen most often with blade burst. Very prominent at stronghold.
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 Images of problem

A black screen.

I have no idea what causes this myself, but I WAS crashing at stronghold earlier while no one else ever did once. It happened randomly in a range from 30 minutes to 2 hours. Very annoying when you're on a 1.5x exp buff.

Probably just the command system in general. Apparently you D/C if you get sealed while using commands too.

I've only noticed this issue with Blade Burst. Initially, I had Blade Burst on the direction+down+attack combo, and I always noticed my character crouching down as I dced, so I thought maybe it was the down+attack that was dcing me, which, I've heard is also an issue. However, I switched Blade Burst to direction+up+attack, and eventually I dced that way as well, as well as spamming Blade Burst using a key assignment.

Probably just the command system in general. Apparently you D/C if you get sealed while using commands too.

It happens very often to me with dragon slash.