Guild Wars 2

So there seams to be an issue with endure pain. You can activate the skill but still be vulnerable for up to 1 second. I have had this issue multiple times and have also heard from other people experiencing this same issues.

yes can confirm that at least the first second endure pain may not work. It happens to me I still take damage from the first unblockable attack, or from sigil procs like hydromancy sigill. Also sometimes seems damage beeing taken from opponent evading attacks (like wirlwind)