Ukrainian soldiers are shooting down friendly drones. Companies making them say it's the cost of a chaotic war. Ukrainian soldiers see numerous drones on the battlefield, and it's not always clear which side they belong to. Roman PILIPEY / AFP via Getty Images Ukrainian soldiers say they sometimes destroy any drone they see, even if it's their own. Ukrainian drones are mistaken for Russian, resulting in friendly fire incidents. Drone makers say it's an expected part of such a chaotic fight. Ukrainian soldiers sometimes wind up taking out their own side's drones on the war's chaotic battlefields, where it isn't always clear if the weapons buzzing above them are friend or foe. Soldiers say that in moments of uncertainty, they may have no choice but to open fire on any drone they see, disable all radio-frequency drones with electronic warfare , or sever the control cables for unjammable fiber-optic drones without knowing the source.…