STROMA? 

[Update: CO2 levels also increase from about 500 to 1300. Maybe that was a contributor? 

Is this stroma? Refer to the videos in this link please:

https://photos.app.goo.gl/wvx6XALc7bNxL6AaA

This is the first time this happened. I obviously let this spawn incubate for too long, as you can see from the mycelium growing up the walls of the bag, and the temperature went from constant 70F to 78 for at least probably a couple days towards the end. I only noticed this growth in 3 of 15 bags. What are the chances the others have it, but it is hidden? You're feedback will determine whether I will toss the rest of the lot or not. Thank you!