Steps: 1) Start Spectacle then select "Rectangular Region". 2) Add some annotations shapes like arrows, rectangle, line... 3) Delete all of those added annotations. 4) Disable "Show Annotation tools" then select a rectangular region that covers where you deleted those previous annotations. 5) Double click inside the selected rectangle to save the screenshot. Expected result: The saved screenshot doesn't include any annotations. Observed result: Deleted annotations appear saved with the final screenshot.
Can reproduce the issue with those exact steps.