Server performance since April update very low

since the april update on thursday the games performance geting lower and lower especialy in chaos dungeon and cube (graphic lags) , iam not the only one who noticed that.
first of all i checked my self if i can find any issues but windwos is uptodate, all drivers are up to date internetconnection is fine. it all starts after the patchs on thursday befor that everything was fine. pls @Roxx tell me that sombody at AGS or SG has noticed and ur working on it ?