Copy and Apply holding me hostage

This seems like a neat feature to quickly do a large batch of photos while in LRC. (I used to use photoshop, make an action and run it as an image processor batch process.)

However the problem is while is running it (200-300 images) takes over the computer. A pop up “processing Image” appears every 20 seconds or so and no matter what screen or task I have switched to it takes control and forces me back to LRC to watch the progress…

Anyone know of a fix for this?