The couple bands used to be classified as debuffs before SoV update. My guess is they were changed to be buffs because of the new Ben's raincoat item. Now the cooldown for them is extended for each choc chip you have instead of being decreeased.

Note: This also applies to burn's 1 second of grace after being cleansed/blast showered

Note: this also applies to Safer Spaces cooldown

Fixed in 2.0.5