When I use the Bard spell Good Hope, I find that whenever another character buffs the bard, I get the message "<Bard's name> attempts Concentration - Failure!" and the Good Hope buff is removed from all party members. I also noticed that when Good Hope is maintained, there is an option to "Stop Concentration" under the Bard's radial menu (spells section). Choosing this option cancels Good Hope.

Note that the Bard is able to cast spells while maintaining Good Hope without issues.

Why is this spell behaving this way? According to the documentation, it appears to be an ordinary buff, not a song that requires concentration. Did I stumble on a bug or are the limitations of Good Hope legitimate?

I hope (no pun intended) that I'm not the only one who uses this spell, considering that its boost to morale rolls is unmatched at the level it's available. Having to pass a DC20+ concentration check whenever a friendly buff is cast on the bard to maintain the spell seems rather odd and inconsistent with all other buffs in the game...

I'm using Co8 and Temple+. Are you seeing different behavior for this spell?

Saddly I don't have acess to the game at the moment to test, but I saw your post in the co8 forum. Try to rewrite it in this topic: http://www.co8.org/community/index.php?threads/co8-8-1-0-bugs.11227/page-57 . Maybe they will pay better attention.

Sorry, I've skipped Bards since p&p AD&D first edition onwards.