Latest VEP7 ilok, latest Kontakt AU2, Latest Mac OS intel
Now and then when opened in VEP the Kontakt GUI freaks out and displays any sort of visual chaos you might imagine: a giant window with a partial stretched GUI, colored snow, you name it. This can happen whether the instance is connected or not, whether the GUI is tethered to the VEP window or not, etc.
I find the best workaround to be creating a new Kontakt instance in the same VEP instance, this will not only come up with a normal GUI but also cure the GUI of the old Kontakt instance. At which point the new instance can be deleted.
I have no specific Repro path for this as of yet.
I suspect the use of the power button and saving/reloading powered off instances may have something to do with it. I use the power button as a better form of sample purge (that works on non-purging players too) across a fairly large number of instances.