Jak sie masz (How are you? in Polish), Stan? Perhaps not so good. I have encountered this problem many times in the field. Sporadic adhesion failure to textured powders can be caused by a couple of factors. The red flag in this case is the texture of the powder coating. Often a novice powder formulator will incorporate a texturing agent based on polytetrafluoroethylene (PTFE) (similar to DuPont's Teflon®), which creates texture because it doesn't melt. The powder begins to flow and level during the bake cycle; however, the PTFE restricts some of the flow, thereby creating a texture. It's a nice formulating technique - unless you want something to stick to the finish. As you might have guessed, things don't stick to PTFE.
Another possible cause could be a gross overbake condition. If the parts being coated are baked significantly beyond the time and/or temperature recommended by the powder supplier, the surface might present adherence challenges. Check to ensure that your bake conditions closely approximate the time and temperature prescribed by your supplier.
I would also ask your powder supplier whether any PTFE is present in the formula. Most powder formulators prefer to avoid discussion about a powder's ingredients; however, this situation is serious enough to warrant this conversation.
Powodzenia (Good luck), Stan. Let me know how you make out.