Quote Originally Posted by Mystic View Post
Contrary to what blizzard blue postings state, the random heroic instance feature is not bypassing heroic instance lockouts. If you've already done a heroic for the day, and you later get a random heroic for that instance, you are screwed. The bosses will be non-existent.

I'm hoping this is an isolated glitch, or else a known bug, and is not now intended to be the way things work.

I did heroic Nexus earlier, and just now got Nexus as the random heroic. I ported in, cleared trash to Omorok, only to discover Omorok was MIA, backtracked and Keristraza MIA also.
If you ONLY use the LFG tool, and do not do any outside of it, it works as intended. But if you do them outside of LFG random heroic then you can run into problems.