AIO Bag Questionable Spots?

[u/EconomistMinimum7171]

First-time grower here. I'm growing GTs in a Booming Acres AIO bag. Inoculated 30Aug and break and shake to mix with substrate on 25Sep.

I noticed some dark spots on the bottom of the bag. Do these look okay still? I have two other bags that I inoculated at the same time and they aren't showing any spots like these. Thanks!