Adobe has released Camera Raw 9.3.1 with several fixes and the software is now available for download.
As mentioned in the Adobe blog, Camera Raw version 9.3.1 fixes a bug that resulted in inaccurate tiles, such as black or white squares when not expected, when opening images in Photoshop.
Camera Raw 9.3.1 is available through the update mechanism in Photoshop CC and the Creative Cloud application. You can update via the Creative Cloud app (Help>Updates), or do a direct download from the links below.
Adobe Camera Raw 9.3.1 Now Available for Download
From Adobe blog:
Camera Raw 9.3.1 is now available through the update mechanism in Photoshop CC and the Creative Cloud application. This version fixes a bug that resulted in inaccurate tiles, such as black or white squares when not expected, when opening images in Photoshop. Please note that this bug typically only appeared when using both the Camera Raw plug-in and Photoshop for long running sessions.
