I have had 3 failures out of 10 units with the TPS61071DDCR boost converter. The device is failing and shorting VOUT to ground and drawing about 1A from the power supply with ~0V output. The supply to the converter is controlled by a MCU switched HS MOSFET. Some of the devices have been through 100's of power cycles without a failure. Once replaced failed devices the replaced device seems to work consistently. Supply is from a 3.5V Lithium battery or when testing a 3.1V bench supply. There don't appear to be any special power-up requirements in the datasheet and general guidelines have been followed.
Any thought on reasons for failure?