Patch 3 will be available via the software updater in your ArcGIS Pro application (if enabled) within a few hours.
UPDATE 9-28-18: Esri has discovered a severe issue with an editing workflow in ArcGIS Pro 2.2 Patch 2 (2.2.2) that may incorrectly set feature attribute field values to “Null” and strongly recommends this patch be uninstalled.
What is the Issue?
Field values may be incorrectly set to Null when using the Attributes pane. This problem occurs when you select multiple features in the tree view of the Attributes pane, use the Tab key to navigate between cells in the data grid, and tab through a cell that displays “(Different values)”.
How do I uninstall the patch?
In Windows, search for “View installed updates”, which is in the Control Panel; right-click ArcGIS Pro 2.2 Patch 2 (2.2.2); and click Uninstall. If you do not have the previous patch—ArcGIS Pro 2.2 Patch 1 (2.2.1)—it can be downloaded from My Esri.
When will Esri correct the issue?
ArcGIS Pro 2.2 Patch 3 (2.2.3) will be available in early October, 2018, and will include a fix for this issue as well as the other software improvements included with patches 1 and 2. ArcGIS Pro 2.2 Patch 2 (2.2.2) which introduced the issue is no longer available for download.
The ArcGIS Pro 2.2.2 patch is now available to download from My Esri and via the software update (if enabled).