League is a month old - still having to find hidden non agroing mobs in spymaster and barracks

It's extremely frustrating as melee, clearing 98% of a room in 15 seconds and then needing to spend 30-40 seconds hunting for hidden, stealthed mobs that won't agro.



Meanwhile, like usual, ranged AOE players are walking in, pressing a button and clearing the screen.





Are the devs actually play testing melee before they put out content? If these mobs were untargeatable for Pathfinder, deadeye and bloodmage for >30 seconds, this would be hotfixed immediately.

Why are melee being left to put up with this terrible mechanic/mob behavior?