I have had no problem with glow filters; I posted some test code here which shows it working in Starling 2
Could there a some problem on certain PCs? Certainly. I have a eight+ year old MacBook which runs Flash and Stage3D fine except for filters which in my limited testing produce utterly wrong results (a blur filter which instead fills the screen with colour). Only limited testing as I added code to disable filters on it when I was working on it; I never tried getting to the bottom of it as I just assumed it was too elderly for even Flash’s limited 3D capabilities.