The Bug

Snow layers are destroyed even with a support block when the mushroom the snow layer covers is destroyed by light. This can happen in any biome, but cold biomes are the best place to perform this bug.

Steps to Reproduce:

1. Disable both the weather cycle and the daylight cycle. But do not set always day to on.
2. Set the time to midnight.
3. Place a mushroom of any kind in a snowy biome like the cold taiga biome. The mushroom has to be exposed to moonlight.
4. Snowlog the mushroom by placing a snow layer in its block space.
5. Set the time to day.
6. Update the snow layer (But do not break their support block or place a light source directly next to the snow layer)
7. The snow layer is destroyed.

Expected Results:

The snow layer will still remain even if the mushroom later breaks in sunlight.

Observed Results:

The snow layer is destroyed immediately, even though it was still in a cold biome and still on a valid supporting block with only sky light and no light-emitting blocks directly next to the snow layer.