That largest mushroom appears to have contamination on it. If I were you I'd rip them off and then spray the whole block in a diluted bleach solution. Also, sniff what you rip off, if it smells bad, it is bad. But that contam may have just flourished in the high humidity high CO2 environment, it might not take hold with more fresh air and lots of light (which you do have, I can see the windows).