When there are many screen differences detected by HP Sprinter, only a summary view appears in the difference viewer, indicating the total number of differences detected, but all the differences cannot be viewed.
Displaying a summary view of the differences detected, when many differences were detected, is product design.
To fix this issue, you can set the "MaximumDiffNumberToReport" parameter in the settings.xml file (Path: %appdata%\HP\Sprinter folder）.
Set the value to around 5000, and reboot Sprinter.
You should be able to view all the differences detected.