Patch Codes are intermittently being recognized.
Unlike in previous versions of VRS, 5.2 enables Auto Contrast with a slider value of 3 by default.
From 5.2 Release notes (new features):
Intelligent Cleanup in default VRS profile
If you have a Kofax VRS Elite or OEM Professional license, Intelligent Cleanup settings are enabled automatically in the default VRS profile. These settings support the ability to correct excessive noise on an image, or to remove background patterns from an image (such as the security background that typically appears on printed checks)
Setting the slider value to 4 has been known to resolve the issue.
Level of Complexity
Article # 3033944