Acrobat Pro wont allow me to use highlighter or other tools if the program sits overnight

Weird thing has been happening to me for a while. I often have several PDFs open at the same time because I have to ref several different files at once. Mostly equipment specifications where one files references me to another file, etc... If I have a few files open overnight invaribly the next more morning none of my editing tools will function properly. The hightlighter doesnt work. The "add text callout" doesnt work properly. When I select that tool and then click on the page to drag my text box with an arrow point to my callout all I get is a text box. So I have to close every PDF and then close the program. Then reopen the program and PDF and my tools will work. I have repaired my installation and I always check and update the software as required. Has anyone else run into?