As the schematic shows, the value of R2 should be 10Ω. However, the actual value on the board is 10KΩ, that causes the demo couldn't start up in low Vin. I've got two demos and both values of R2 are 10KΩ. It must be a mistake during mass production.
10Ohm should be the correct value. Notice will be sent to eval board group, and correction of AN-1956 to follow. Thanks for bringing this to our attention.