When sleeping in 3rd person, camera doesn't reset, leading to a 3rd person camera effect when sleeping. It's actually pretty neat and useful. Instead of fixing it, maybe add this bug into the game as a feature, polish it up a bit. When you sleep in first person, the normal sleeping animation plays. When you sleep in 3rd person, you can see things around you.
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We're tracking this issue in MCPE-148505, so this ticket is being resolved and linked as a duplicate.
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