Indoor closet grow

I did not feed this week just water I ran into a strange issue with one of the gelat og plants started noticing brown dots I thought it might be calcium Deficiency cause I stop using cal mag this week and still using ro water let me know if you think it’s something else. but The buds are stacking up tho and getting frosty. The gelat og smells like sweet or pine citrus, the gelato smells kinda like fruit loops or sweet smell can’t describe.