Grinding Gear Games tweeted out a quick update on the patch and explained their reasoning behind withholding it,
“Yesterday we indicated that we expected to post the 3.13.2 Patch this week. We've uncovered an issue during testing that's serious enough that we cannot safely deploy the patch before the holiday weekend in NZ. We will let you know our new ETA soon. Our apologies for the delay.”
As of this writing, the exact date and time for the release has not been shared. Patch 3.13.2 was meant to introduce several performance improvements ahead of the 3.14 expansion titled Ultimatum. In fact, there’s a live stream scheduled for April 8 which will show off Path of Exile 2 along with the Ultimatum expansion.
Right now, however, we don’t know much about Ultimatum other than it’s currently scheduled for release on PC on April 16. The console release is expected on April 21.