I too am a new user of the H8000FW.
I had similar experience at first.
Here's what helped me, and might help you.
Giant patches, even though are factory default,
sometimes have trouble running at 96k clock.
(At least on my unit.)
Try lower clock?
Read up in manual about managing I/O levels.
Certain large patches, I can repeatedly make my H8000FW 'glitch'
by launching in a sound waay too loud while at 96k.
In this case, I definitely think that's user error on my part.
My unit's clock also fluctuates ever so slightly, like by 1 number.