the loose spokes are causing the nearby spokes to be over-stressed then break...

the spokes are loosening due to , i'll guess, a bad rim that is either wearing quickly, or deforming quickly, at the spoke holes..........

I'd be back at the purchase location., or a nearby warranty authorized shop, looking for compensation, in the form of a wheel assembly that doesn't self-destruct.

contact the Bike Manufacturer, AND The Rim manufacturer directly too.. WTB (Wilderness Trail Bikes) is a decent company, with a reputation to defend... hit 'em up tomorrow.