First Time I've had this problem. Going to et another fan to draw air out with. I had an old, oscillating fan in there. The base finally broke off so I zip tied it to the overhead support! Actually getting better air movement now.
I lost maybe an ounce of bud so not too bad. but OI wasn't going to wait for it to get worse so I chopped the 7 plants that were closest to ripe. Hoping the last crop out there does better. I expect with the other plants gone, airflow has improved.
And you can cook bud with mold, just can't smoke or vape it. The buds I found with a few spots will get cooked. I did chuck the worst ones though .