I did not see anything in the forum addressing this, but I can't be the only one..
There are some NPCs that show up in a room as 'A guard.'
So I target them with a spell, intent to cause damage. And -
instead what happens is I'll attack the guard in the party,
and chaos ensues.
This is more of a building anomaly as opposed to a bug, I wager;
I could see it as either -
1) Bug fix suggestion: check for non-group target if an offensive
skill/spell/song/prayer is being used first, and a group target if
it is defensive.
2) Building fix suggestion: add an adjective to anything called just
'a guard' so it is clear there is something else to target.
Then shame on us players for getting it wrong.
Aware I don't need to specify a target aiming from second row once
engaged with something. But in the back row, it's a necessity, and
I'm just 'lucky' I only threw a training group into chaos, and not some
PVP. Meh.