Since the last update, hostile mobs are clearly spawning in places where the light level should prohibit them from spawning. Not as sure, but even passive mobs seem to be spawning where they shouldn't. The first issue is potentially game-breaking, as it prevents the ability to create a safe town.
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Thank you for your report!
We're actually already tracking this issue at MCPE-41586, so we will resolve and link this ticket as a duplicate.
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