[Gameplay] Units dissapearing at the start of the match (champions, minions, etc and their vision)

The 9th of March 2015 (yesterday at the time of writing) I suffered from a bug in which units such as champions and minions (incluiding myself) are not visible, even shared vision is not available. Only the structures, turrets inhibs and nexus, were visible, the "full base vision" (in places were turrets' sight is not in range) did not work though. On top of that the gold amount was not displayed and it seemed that I had 0 gold as I could not buy any item. I took a screen shot that shows this issue with sufficient clarity. You can see the vision and unit issue as well as no money number displayed. However I could still use chat and communicate with my team who suggested reporting the problem. As this bug happens just at the start of the match I am afraid I cannot reproduce it. I should also mention that restarting the match happens to fix this. I had no more issues of the likes since then. Thanks for your attention.