I was killed as a lvl 50 miner by AoE in Mor Dhona. I had the node window open at the time but was afk (not long enough to have run out of time on that node) so didn't see exactly what managed to knock me out of stealth and kill me.

All I know was that I was dead as a result. Doesn't look like I was 'invulnerable' after all (as per the patch notes).