I got the same problem, new links in Object dok are invisible untill......
I made a map with in it all links / shortcuts AND icons (*.ico).
If necessary I made icons with the free programm IRFANVIEW (select from the net an picture, crop it to size, and save as ico.
Goto (with right mousebutton klick on 'space') to >> Change this icon / shortcut..... Then left mousebutton.
And 'change icon' from the invisible shortcut icon into your selected icon.