Beacon Beam Bug
If you place any type of stained glass above a beacon, the beacon beam will become stretched. Video below.
Linked Issues
Created Issue:
Beacon Beam Bug
If you place any type of stained glass above a beacon, the beacon beam will become stretched. Video below.
Added ADO: 82217
Added Attachments:
Added Linked Issues:
duplicates
If it was fixed it is evident again in 1.2.20.1, as shown by MCPE-32653.

Thank you for your report!
However, this issue has been closed as a Duplicate of
MCPE-25540.Your additional information and observations are very useful, so if you can add them to the comments section of the parent issue it would be appreciated.
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