[MCPE-82519] If you create obsidian with water and lava it will emmit light

I was creating a cobblestone wall in my minecraft world on my xbox one s and when i created obsidian i saw that sometimes it would emmit light.

Linked issues

That happened to me i placed lava in a water source and it turned to obsidian and it had the light level same as a lava source

i play on iOS and i have this same bug, and im pretty sure this bug also applies to 1.14.30