During the last combat in the Ophidian Palace, my pirate and two companions had joined two other pirates and their companions. Twice during the combat Ophidian Warriors "occupied" the same square that either I occupied or one of my companions occupied. As a result I was unable to assign any action to them so during that round they did nothing. However, the Ophidian in the same space went on happily attacking other pirates and their companions. This seems like a bug to me.