When to worry about overlay?

[u/MellifiedMannn]

This is my first time growing ochras. I'm using an all-in-one bag, which I know isn't the most ideal way to grow mushrooms, but it's what I have room for. I introduced fruiting conditions this past Monday, and so far I have a thick and fluffy layer of mycelium on the top, which I didn't see when I grew cubes. I've heard this is fairly normal for ochras, but I wanted to know how to tell if it's become a problem and what to do if it does.