Is this a bug

[wimlin]

I am a caster. If i bind myself in a zone for safety so I can gate when in trouble should a mob I aggro be able to nuke me from halfway across the zone if its a caster? For instance tonight I aggro the sarnak chancellor and realize I can't take it(because hes a shaman). I am bound near the FV zoneline and he starts casting a nuke on me as I gate. Nuke hits me and kills me near the FV zoneline. I've actually experienced this many times so totally reproducible, but this is the first time it actually killed me. Is this working as intended because I know it didn't work this way when I started playing in early velious.