The Black Knight needs a warning about zone out

Zoned into black Knight. BEFORE the fight started I zoned out to check something. there was NO message or waring saying I couldn't zone back in...Never mind anouther attempt at the challange, all that ore lost becuase there was NO WARNING, NO MEASSAGE, NO "oops ur screwed dude". Just a "Cannot connect to instance. That subarea no longer exists."