How do I uninstall the patch? In Windows, open the Control Panel and search for "View installed updates"; click this option. 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 website. (https://my.esri.com/)
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 pan, use the Tab key to navigate between cells in the data grid, and tab through a cell that displays "(Different values)".
When will ESRI correct the issue? ArcGIS Pro 2.2 Patch 3 (2.2.3) will abe available in earch October, 2018, and will include a fix for this issue as well as the other sofware improvements included with patches 1 and 2. ArcGIS Pro 2.2. Patch 2 (2.2.2) is no longer available for download. For the most up-to-date information on this matter, see this GeoNet Post.