Sometimes icons disappear when take a photo

On my notebook, sometimes when I take the picture and the icons disappear, to report it I discovered that if I leave the window open for the selection of another rocket I can move and recharge the scene and the icons reappear. To recreate the bug I had to try several times, I could not figure out what it depends on sometimes it goes other than not. The screen shot was not taken and are not in my library when the icon freeze an i switch rocket... this is a screenshot of the actual scene after the switch (this screenshot worked!)