Veredict: The Z1c still makes bad night pictures with noise, but at least the bleed is removed with the fix, because the light will be blocked by the black paint from reaching the sensor. The pics will even look better, with correct colors and looking more natural.

Samples: The first pic is in darkness with the only light beeing from the street and from those apartments.
The second pic is in my living room with absolutely no light and complete dark.

You can clearly see the light bleed on the lower part of the first two pics that doesnt have the fix.
You can clearly see that there is no more light bleed after the fix.

Those below are without the bleed fix. (superior auto + led on)

Now the same with the fix I made , and same camera settings:

Sony Xperia Z1 Compact - Stock