This bug has happened several times.
When in a dangerous province (today I was in Bunar), I attacked someone that was out at one of the digging sites. I selected my mercs ( totalling over 1500 gold in salary) and clicked the attack button (crossed swords) to raid the individual. Between the time that I saw them listed and clicked the attack button, they must have left the dungeon and could no longer be attacked, because there was no battle report, only a blank 'Heroes' tab, and there was no damage to any of the fighters in my party. The problem is that the 1500 gold in salary was still deducted from my wallet, even though there was no fight.
It seems that the first thing the system does is debit the gold for the salaries, then check to see if there is an available opponent. If there is no longer an opponent, the gold should be returned. At this time, that isn't happening.
