Premium Friend Buff doesn't double mine production

I have a Premium Friend buff running and it has doubled the production of mines that were built before the buff was started - level 3 mines, buffed with aunt Irma's feast, showing an output of 12.

Mines that I built after the PFB was applied do not get their single buff doubled - level 3 mines, buffed with aunt Irma's feast, showing an output of 6.

Nevermind, ignore. It must have been a glitch or lag.

I logged in today and the buffs are doubled.

Yes it took some time for it to register. I was on pisn and needs when my pumpkinfields didn't trigger with it. Eventually after swapping to an adv an back they did.