Mouse cursor lock

I'm using Playmaker (visual scripting) to set my cursor to a reticule, then lock it to the center of the screen. This works fine in the editor, but when I make a build and test it in there, the reticule moves freely about the screen as if it's not locked.

I'm also having a problem in the actual editor with the reticule as well. It stays locked as it's suppose to until I pause and then unpause. At that point, it moves freely about the screen until I click once, and it locks itself back into place.

Has anybody had any similar issues with mouse inconsistency? Any ideas or suggestions as to how to fix this would be greatly appreciated! Thank you.