WP Smush Pro stuck on a file


I'm having a similar issue as this thread: https://premium.wpmudev.org/forums/topic/wp-smush-pro-still-optimizing-my-images-after-4-hours

My site has over 3,000 images so I do except that it will take a few hours, however, it is stuck on a file and I can't diagnose or find what file it may be stuck on. My host says that the site isn't throwing any errors and suggested that I contact you.

Is there something that you can suggest or help with?