Went to do a Mythic 16+ Iron Docks with the Guild.
The Dark Yellow Cloud Wall Appeared as we inserted key, the 10 Second Timer didn’t start until almost a minute later.
The GrimRail Enforcers did not spawn @ Boss Fight #2 Location, we couldn’t Earn Rating or get loot.
Key level dropped down as we left.
Boss 2 in Iron docks doesn’t have adds. It’s the council fight.
I’m not sure what you’re going on about with adds.
The second boss fight of Iron Docks is called “Grimrail Enforcers”. The OP is saying that they never spawned.
@OP: it’s hard to check retroactively, but did you notice the RP progress from Koramar and Zoggosh as you went through? For example, when they start with the cannons in the area right before second boss, there’s specific lines. Then Zoggosh does the “He’s out of ammo”, and the second boss spawns after. There’s a specific voice line associated with the spawn. If something prevented the cycle from progressing (e.g. maybe a pack your group skipped), I could see that being a reason the boss wasn’t spawned. Or it could be a bug that preventing the triggers from firing.
Just a small clarification here. They key didn’t drop as you left. It drops a level as soon as you put it in. You then have the timer available to replace the dropped key with a new one.