I am a new user to Acrobat DC Pro, however, I find that Acrobat recently has been very unpredictable in a way that it corrupts multiple pdf files. It will all work fine at first when I first open those pdfs and after a few days, when I try to open those files, either part of the pages becomes blank or half of a page becomes black in the background and contains green words.

I have check my accessibility setting in preference and I have the color changing setting off.... I wonder why this continues to happen, and it is very frustrating when confidential documents becomes corrupted like this!!!