Controllerless Networks

I have several sites where we have not fully refreshed all of our AP's from 335's up to the 535 model, and some that are 535 only.  Since we can't upgrade past 8.10.x.x (335's are not supported on any higher firmware version), I'm reviewing the release notes of newer versions and found that 8.10.0.12 has no resolved issues.  I also see:

There are no new features, enhancements, or behavioral changes introduced in this release.

I'm curious what was changed between versions to cause a minor release if there was nothing being fixed or added?

https://www.arubanetworks.com/techdocs/Aruba-Instant-8.x-Books/Release-Notes/810/Aruba-Instant-8.10.0.12-Release-Notes.pdf

8.10.0.12 was a fix on the controller side, but the controller and Instant code bases are kept in lock step so you've got an Instant release with no applicable changes.