Piercing the shroud bug?!?! Help!!!

Hi guys, I need some help!

I did a quick run of most of the campaign missions in normal mode to get the upgrades. Going back now to finish them in brutal to get kerrigan's portrait.

I started with the most difficult missions e.g. all in, great train robbery etc.., and midway through Im doing piercing the shroud. However, whenever I finish piercing the shroud, it seems my entire campaign reverts back to midway. Meaning that all the missions I completed after it e.g. hells gate and all in are uncompleted and none of the missions I completed in brutal are registered. It's almost as if I got transported 2 weeks back in game!

It doesnt happen if I complete any other missions in brutal. I can just go ahead and complete other missions, but completing piercing the shroud seems to disable any missions I did when I completed it on normal mode. Can someone please help? Thank you.

 

Pretty sure you can't do it that way and that you need to play the game through on brutal. I'm not entirely sure.

 

Same problem.

I completed the campaign on hard difficulty, then i wanted to do the "Hurry up" achivement, so i started to play missions on normal difficulty in random order (within the same campaign) and when i did the "piercing the shroud" mission my campaign state revert to point where i unlock this secret mission (all missions which i played after "piercing the shroud" for the first time are gone now).
It looks like when you complited this particular mission again, game revert its state to point where you unlock this mission.

Did you post a bug related to this feature to blizzard ?