The beacon light is only visible on one level of my castle. I made a 6 beacon pyramid at bedrock level. The light shines through an unblocked tunnel up into my throne room. From that level if you look up the light appears to go all the way to the sky. When you go to the other rooms about it the light disappears.
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We're tracking this issue in MCPE-17595, so this ticket is being resolved and linked as a duplicate.
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