Just to be on the safe side, make sure it's installed correctly, with the spring in the proper position. I did once have an issue with drop of nozzles because the cap top wasn't sitting correctly. Might not be your issue, but at least you'll be able to rule it out. It could be starvation, but you'd see it in the lines going to the head, if they aren't full of ink, then it could be that, however if they are filled, then it would be hard to think that ink starvation is the culprit.