When I had my Majesty it was pretty consistent but here are some thoughts on things to check out until support gets back to you.
Is it more prevalent on the lower strings? Maybe possible EQ issue if so?
Does the piezo being enabled influence the issue at all? Is the regular/magnetic pickup volume good without the piezo enabled? Is it the piezo pickup volume that is inconsistent? There is a trim pot on the back to help with piezo blending issues, but I'm not sure if its relevant to your issue or not.