Just days after the last release, Apple has made a new build of the iOS 11.2.5 beta available for developer testing.
As with the previous four releases, the testing notes are very short, and list nothing specific. Developers registered with Apple can download the beta through the software update feature of the settings menu.
Other than a daily news podcast feature invokable from Siri, there appears to be no new features in the release. As a "sub-point" update, Apple generally sticks to stability, bug fixes, and speed enhancements.
Likely included in the update are also rectifications for Spectre, not previously introduced by Apple 11.12.2 update.
On a first generation 12.9-inch iPad Pro, the update weighs in at 1.87GB. At present, it is not clear why Apple shortened the testing cycle, but pushing out an update to all users for Spectre seems the most likely reason.