Replying to Anyone have this weird issue with their K2 Mindbender boot walk mode?

I recently bought a pair of Mindbender 130 boots. First two days the boot felt great, skiied and walked well.

On my third day of riding the boots, the left and right boots suddenly began popping out of ski mode into walk mode under forward flex. I checked for debris and ice in the mechanism, and finding none decided to fiddle around with mounding screws and the ski/walk mechanism itself to no avail. The boots continued to pop into walk mode under forward flex.

Has anyone experienced this issue with their Mindbender/similar boots, or does anyone have a potential solution?