Changing Instance Delays resulting in Death

When you enter a new instance, your character doesn't instantly become inactive in the previous zone.

Lost a couple of hardcore characters because I attempted to move from one zone to the next, and then about 5-10 seconds into the loading screen was sent to the login screen only to find my character had died in the previous zone while completely unable to control that character.

Maybe this is intended, however I doubt it and I feel that character(s) should not remain vulnerable to damage/effects as soon as that load screen for instance change has been triggered, especially with a hardcore aspect in the game.

To confirm, the character is not visible or playable, you are 100% helpless to the outcome.