Light-Bug (MobTrap)

Hello

Today I built a monster trap. Here I noticed that the light engine has probably a small problem. I built at the height of 126 is a monster event. If the ceiling of the Monster case consists of one full block, but light shines in the case. Only after I found everywhere a 2nd Layer of stones was applied, the light level dropped to 0. Previously, the light level 3 to 12.

Its tested on Creative AND Survival.

I made screenshots of it.