I have had 18 cars with PPF, and multiple cars had some repainting on front bumper.
The film is more durable now, but it used to discolor quite commonly and have to get replaced. I have never heard of any difference between OEM paint versus a quality paint job.
I would suspect it would only a Problem on repaints there are poorly prepared. I know where they sent this to be repeated, and have had that shop to work on my Porsches, Lotus, Lamborghini, Ferrari and Mercedes and can never tell a difference from OEM.