I changed my IVs but the stats are still the same

So, I have a Jolteon at lvl 60 (timid) with a SPA IV of 15, as soon as I got an IV Stone I went to maximize his SPA IV to 31 in the IV Changer, the problem is: his special attack stat doesn’t change from 150. According to Poke Showdown his special attack should be 159 after the IV change, which wasn’t the case.

I just want to know if this is some kind of bug or if it was really what was supposed to happen, and why

nvm, I leveled up and the stats went normal :thinking:

It doesn’t apply until you enter battle I believe.