Was doing shao with my Hero friend and when we split the boss and summons I realized that the stun wouldn't expire Skills used: Hero: Shout to stun the mobs Thief: Shadow web (which I normally use to hold them)
As a temporary fix, change your client's properties to run in compatibility mode for Windows 7: Find your MapleRoyals folder, should be C:\MapleRoyals\, right click MapleRoyals.exe and select properties. Select the Compatibility tab and tick 'Run this program in compatibility mode for:' and choose Windows 7. Click Apply and then launch the client.
