D/Cing in Ultimatum, very frustrating and not fun.

My guys at GGG why in the hell would you allow us to D/C or just straight up leave sanctum and come back with no issue, but Ultimatum you lose all progress. I crashed on the boss 3 times. 3 failed runs because of something out of my control. I wouldn't be bringing this up if we didn't have it in other modes. Make it for one make it for all. Just my opinion =D