Edit:
Ok. I just now read that you should NOT shake Gelish. hmmmm
In the olden days (i.e., when gel polishes were new - 2010), it was felt that one distinction between 100% gel products (Gelish) and hybrid products (CND Shellac, Gelac, Light Elegant) was that in hybrids, the pigment would separate out and they needed to be shook. I think that over the years we've discovered that the pigment or glitter can separate out with any of these products and shaking is often necessary. Yes, it can introduce bubbles, but just allowing the bottle to sit for a minute after shaking should let them rise out.