The 3 epic heroic encounters in Icewind Pass have been inconsistent in counting toward Sybella's Heroics quest for a while. Today I also completed Barbarian Champions in Bryn Shander and did not receive credit for Sybella's weekly.
I haven't had that problem, though I can imagine it's annoying for you (and time consuming). Do you run more than one toon and if so have you noticed the same happening on the other(s)?
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Xael De Armadeon: DC
Xane De Armadeon: CW
Zen De Armadeon: OP
Zohar De Armadeon: TR
Chrion De Armadeon: SW
Gosti Big Belly: GWF
Barney McRustbucket: GF
Lt. Thackeray: HR
Lucius De Armadeon: BD
Prospector Attack requires GS but Raid the Raiders does not. However it can sometimes bug out and not spawn the loot items needed to progress. I have also failed to get credit if I didn't attack the boss.
Beholder HEs in Dwarven Valley count but are ver infrequent.
"We have always been at war with Dread Vault" ~ Little Brother
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Xael De Armadeon: DC
Xane De Armadeon: CW
Zen De Armadeon: OP
Zohar De Armadeon: TR
Chrion De Armadeon: SW
Gosti Big Belly: GWF
Barney McRustbucket: GF
Lt. Thackeray: HR
Lucius De Armadeon: BD
Member of Casual Dailies - XBox
Beholder HEs in Dwarven Valley count but are ver infrequent.