Re-clicking on annotation does not take me to its page

Hello, just another usability observation.

  1. Click on annotation on the left sidebar. It takes me to the page where the annotation is.
  2. I scroll down some pages again, reading. But feel an urge to go back to the annotation.
  3. It is already selected on the left sidebar. I click and nothing happens.
  4. I need to click on another annotation first and re-click the original annotation to be taken to its page.