You can place any type of doors and beds inside your hitbox. You just need to place it at your feets. It looks like it's only the two blocks tall or long, blocks that do this.
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[Mod] OcelotOnesie
Thank you for your report!
We're tracking this issue in MCPE-65671 and MCPE-169537, so this ticket is being resolved and linked as a duplicate.
If you would like to add a vote and any extra information to the main tickets it would be appreciated.
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