Only PART of it was temporary, and if I make my save, I kick their arses. But, instead, I have to run because 3 more hits and I'm dead.
Something that is broken AND totally changes the outcome of an encounter...THAT sounds like a bug. If it says I get a Fort save, it should count for something, not kill me after 6 hits.
Just because it appears temporary doesn't mean 1) I can't die from it, 2) it's unfair and counter to the rules, and 3) it's not a bug. That concept is ridiculous.