Slime farms are working overtime because everything is seen as transparent above (as seen in below screenshot).
Villages are not working too as stone roofs are seen as air and therefore not a valid building.
I have also been upgrading up through the snapshots.
s
I can confirm that I am having the same issue. Please see the attached screenshot of a cave spider spawner room, surrounded by stone, but light levels are high enough to affect spawn rates.
Workaround: Destroy all blocks and replace with dirt.
Slime farms are working overtime because everything is seen as transparent above (as seen in below screenshot).
[media]Villages are not working too as stone roofs are seen as air and therefore not a valid building.
I have also been upgrading up through the snapshots.
s