Upon application launch, corresponding icon shows, and repeats launch animation, after dock auto-hides

Some ways of launching applications - for instance, clicking the link on the version number in Crossover (run Crossover; click 'help'; click 'about'; click the Crossover version number, which is a link, the clicking of which runs the default browser) has the effect described in my title. The result is as in the screenshot posted here: http://imgur.com/tU6GZVr (In that image, the mouse pointer is next to the offending icon.)

Let me try to be clearer. The problem is as follows. Sometimes when applications are run - applications that have launchers on the dock - the dock icon on the launcher persists when it should not.

This bug is somewhat irritating.

Cairo-dock 3.4.99.alpha1 on Linux Mint 17.3 x64 Cinnamon. Intel integrated graphics.