[Zubersoft]

I downloaded both of the files you attached to your post and imported them on my Samsung Galaxy Tab S4 running Android 9.0. Both worked without any problems. So this leads me to believe there are settings on your device that might be perform post image processing (enhanced contrast type features in the OS, for example) or less likely, you've changed some settings in MobileSheetsPro that I don't have set on my device which is causing the difference in behavior. At least with the default settings, the files load just fine on my device. I can continue testing on other devices, but I'm pretty confident the results will be the same. If you'd like to make a backup of your library and share the link with mike@zubersoft.com, I'll be happy to continue testing. As it stands, unless I can reproduce the problem, I won't have any idea of what to fix or change.

Thanks,
Mike