(quest item)

i was doing icc 25 raid Instance ID : 5883292 , we killed Rotface Boss and it dropped Rotface's Acidic Blood (quest item ) and raid leader rolled it and i won it so he gave it to me and i have it on my bag ,but after we killed Festergut Boss it didn't drop Festergut's Acidic Blood (quest item ) which is strange because it always do so the player have both quest items at the same run , i have opened at ticket to speak to GM with attached screen shot of the raid bug but got no response till now

Wait for response.
I don't think they'll do anything. Try your luck during next raid lockout.