A friend of mine plays kabal and we ran into an odd occurance and spent some time trying to replicate the situation.
In this video, Kabal first walks back as far as he can, and sub-zero takes 2 steps before he ice clones. Kabal then performs a nomad rush, in which Kabal will hit the ice clone, but disappear behind sub-zero. I then follow Kabal with an Ice slide and he starts to teleport away in an odd way.
The second attempt was to see what would happen if i actually caught up with kabal while he was frozen so i performed the same glitch in the corner, and even though he was frozen, Kabal was in an "invulnerable state" and I was unable to hit him and walked through him.
The rest of the video was to show that in a closer distance, kabal uses nomad rush and collides into sub-zero's ice clone and freezes on contact with no glitch effect.
