I didn't have any issues during the closed Beta, the open Beta is a different story. (XBOX)
I experienced invisible NPC's, NPC's not showing up on radar, NPC's doing much higher damage than in the closed Beta, continuously respawning NPC's and elites at control points, and the old sound glitch where the machine gun just keeps going after you die.
None of this occurred during the closed Beta and I played every night.