Ok everyone to explain the situation, the issue was once a certain algo's diff goes over a certain point other algo's wont find blocks. We have a fix for this but cannot implement it until C-CEX is able to update their wallet otherwise we would create a fork. So for now use sha algo and we have contacted C-CEX to be ready to update to the updated wallet that fixes this issue. My team and I are terribly sorry for the inconvenience and it will be rectified as soon as possible. Once we have support's attention at C-CEX this should be a smooth transition.