GK one shot by clone in JMK tier III

I had done the first two tiers completely before going onto tier III for the last 150 shards needed. I tried sending a ticket in game, but have gotten no response yet. Anyway, I had gotten to the second phase and got rid of Clone Veteran first. Then as I was almost done with them, one of the remaining clones just deleted GK from the field when my GK had full 108k health, half proc, proc up, and foresight. Immediate loss. I was stunned and tried to find a way to contact about the problem. I did a second try for it and did the exact same stuff I did the first time and had no problems. I don't know what the heck happened, but it wasted 60 LS GL tickets that took a while to farm up and makes it to where I have to get an extra 60 just to make up for what happened. I did not take an image, because I was not expecting that. It also showed no damage value when GK just disappeared.