Hey, I was questing in Cool Ranch a bit, and I had to defeat some Banditoad ships. But whenever one of us was about to die, we'd become semi-transparent and I wouldn't be able to attack until I got back to full health. Some info. Character Level: 19 Ship: Santa Francisca (Monquistador Skiff you get after completing Monquista)
It could be that the ship that is about to die goes back to the wind lane.
The banditoad ships can only attack one ship at a time, so, only one ship gets attacked. If that ship then runs back to the windlane, the combat ends, and you cannot attack that ship until it is back at full health.