If you are on a Mac, you can take a screen recording in QuickTime. Just open QuickTime and go to File -> New screen recording, and then go back to _____ and get the bug to happen. Then send me the video. If the video is too big to email, you can use a cloud storage site like Google Drive or Dropbox.
For Windows, there are various screen recording apps available. Here's an article that lists five free ones.