Insane difficulty achievement bug

Just finished the campaign on insane, in chapter select it shows all chapters competed on insane but never unlocked the achievement for beating all chapters on insane

Yes.me too:(

Im in the club! Yeah…

I have the same … 80%
After finishing Insane difficulty, I make an other one in Normal difficulty.
I obtain the Achievement to finisgh my campaign at the end of Act II - Chapter 4.

I’ve seen that I gain 6% each for chapter I, chapter III and IV
So I re-launch this part on Insane but noting . I gain 13%, I have 93%, but the last chapter is stuck.