i have been using zorin for the past 6 months and this bug has been present since then. Recently Zorin was crashing a lot so i though i might reinstall the OS and even after reinstalling this web app's bug "when selecting the icon, the icon does not appear " is still there. I also uploaded a video on youtube about the bug since there was no option to send video in the forum, here is the link. Plz watch it in low volume, my fan was a bit too loud.