Is having a job that you love an advantage or disadvantage when applying for a Masters? I'm currently applying to a masters program in a field unrelated to my current line or work. I am lucky to have a job that I love in a different field. Will this make the admissions committee question my commitment to their program? I am satisfied with my current job, but the Masters would enable me to try and do my dream job.

In case it's relevant, my PhD is in physics, and the Masters is in Computer Game Engineering. I am applying to a one year, full time taught Masters at a UK institution. (Related to this question.)
If it is a full time master, I strongly advise you against having a job, especially a full-time one, at the same time. I don't know what the degree you're applying for looks like, but a master's course is usually pretty demanding and requires a lot of personal work. By pursuing two full-time activities at the same time, I think you put both of them at risk.