There is a free program called mouse jiggler that you can download and install. Open the program (its just a small box), make sure both boxes are checked. I keep it on my desktop. I have been using it since 2010 and PS never closes on me. The only time you need to reopen mouse jiggler is when you have done a hard boot on your computer.

I am able to keep PS open even when idle as I often am reading or researching tax law while in the program.

Try it, you'll love it