Clipping happens quite often and with different skills, e.g. when Wings of Ishmir is used sometimes your character lands and is is waist level in the ground and you cannot control your character movement ( using the skill again usually corrects it). I have used dodge and dodged into areas where leaving the game is the only way out, or dodge rolled off the map into an unrendered area. Then theres getting knocked off a map when being attacked and falling into an unrendered area where leaving the game is the only way out. Lastly portals seem to fail no matter the map.