Could have been work that was already in progress. As for the raws being up to 76, I'm a bit confused on that as well. The raw page seems to be a bit messed up so, I'm not sure if its reliable as of right now (missing chapters and theres due dates for chapters already out and they all have the...
I messaged Leviathan (I think they're the leader of platinum not really sure) but, he said that there was no updates on it at least for this month since he has finals. With that being said, I do not think it got dropped. Should be noted too that I think ch. 64 was the end of the volume so, there...