Issues which were resolved in the Pega 8.1.4 Patch Release can be found here.
Please note that these patch releases are cumulative, so this also contains all fixes made available as part of previous Pega 8.1.x patch releases. Pega 8.1.4 is the highest quality 8.1.x version available!
Back in 2018, with the release of Pega 8.1, we announced our shift from hotfixes to Patch Releases. The patch release program approach allows us to bundle, test, & release bug and security fixes over a given period into a cumulative patch that will be available to all customers. This new process provides value to your business through improved overall quality and better dependency management. Look for a new cumulative patch release to be made available every month
As per the documentation given , it seems we need to run the upgrade script to apply the patches (After migrating to new rules schema , which is similar to out-of-place upgrade process ) . How applying patches is different from upgrades ?
After you patch your system, the new version information will be visible on the ‘About Pega Infinity’ screen (click PEGA on the bottom right of Dev Studio). The changes will not be visible in hotfix manager.