Baked GI / Lightmapping glitches

Hello so i was trying out the Top down Survival shooter tutorial from Unity and downloaded the assets to Unity 5.0.0f4 and when i bake the scene i get weird glitches all the time , i even tried it on a different computer on a different OS both produce the same Lightmapping glitch

A Example of the lightmap glitch i’m talking about

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I found a temporary fix for this problem, which is to not use “Baked GI” at all just using “Precomputed Realtime GIwill fix it, but it will be resource intensive so it’s not a permanent fix