I don't see this bug listed anywhere else so I'll throw it out here and see if anyone else has had the same problem.

I know that I have seen Dauntless work properly, but in this case it did not.

Troll Slayer is going to block an Ogre with no assists. My Troll Slayer fails a precarious position roll which I reroll to a success. Dauntless fails to trigger and he makes a -2D block. I checked the log numerous times and the roll was never made. Also, the little "Dauntless" in blue text did not appear above the player. I'll have to see if I can get the replay and upload it after work.

Has anyone else had this issue?

Sounds similar to the bug that I reported here: viewtopic.php?f=13&t=438

I think that all the times that we didn't get to use dauntless in the case above we also had to roll for precarious position - which I think is causing the game to bypass the dauntless roll even when the precarious position roll is passed. Was your trollslayer making a block or a blitz action when this happened?

I don't believe this was a blitz, but I could be mistaken on that. I'll double check that.