Actions not acting consistently

I am adding toggle/play actions to my program. The past couple of days I started having intermittent issues. In my action I select "Keystroke" type in the space bar, select toggle Play/Pause, select my audio file. When I test it, it doesn't work. I go back to the action and key trigger is blank. I will try again and it repeatedly doesn't work. I delete it and start a new action. Sometimes that works, sometimes not. Sometimes I have to close the program and come back to it later to get it to work. This is really frustrating. I also have had other actions set up that work on 10 pages, then doesn't work on one. I check everything and there is not reason. I close the program, come back later, and I can set it up and it works fine. Since it is intermittent, it's hard to investigate.