Microbubbles on kitchen cabinet doors using HVLP sprayer, how to fix the issue?
I've had similar problems with my HVLP gun and after playing around with it and asking Google for tips I found that


Good quality paint (as in excellent coverage paint) is essential for spraying because you are diluting it thus reducing the coverage. 
Diluting is essential and finding the right mix is trickier then it seems. I found the consistency of heavy cream works well with my gun. 
Less is more. Don't try to apply it thick. Mixing the paint and applying it in your garage is not an exact science. Pros have the facility and the equipment to know how to micro adjust the environment and equipment to get a favourable result quickly. It's better to do many coats once then 1 coat 5 times with sanding in between. 
The secondary air is very important to adjust properly. It dictates the spray pattern characteristics.
Always spray perpendicular to your nozzle. As in left to right if your spray pattern is oriented vertically. 
This is the most important. Test and adjust repeatedly on a scrap 


At first I found it difficult and messy. Now I use it to batch spray gas pipe quickly, baseboards, doors and casings, I've even done walls but for walls I apply it thick and backroll for texture. 

I think based on the image your applying too much with too high a secondary air setting. 

I'm by no means a pro. But I have work it out with my setup.