So I started Trials of the Luremaster and, in the initial Harpy attack, a couple of my guys went into panic so my bard played 'The Song of Curren Strongheart' to give immunity to fear - the heart symbol disappeared and the characters' indicators went green from yellow but I didn't regain control of them, same with some creatures I summoned - they just stood there!
Is this a known bug?

LOL just had the same thing over a year later, googled and just found my own post! Still nothing?

Maybe it's just a different state using the same symbol, normal fear would make the characters run away instead of standing around.