Mobs now spawn on leaf blocks, chests, beds, glass blocks, buttons placed on top of blocks, pressure plates, stairs (not upside down), and blocks with fence posts on them. These are just the ones I've tested as most of these are blocks used to prevent spawning.
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GoldenHelmet
Duplicate of MCPE-54241.
[Mod] Celesian
Thank you for your report!
We're already tracking this issue at MCPE-54241, so I will resolve and link this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated. If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
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