Beacon Beam Not Rendering Correctly (Black)

The beam from a beacon is not rendering properly. It is black and has extra black 'edges' around it, and flashes.

Tested on LG Nexus 5 and Samsung TabPro

Update by [Mojang] Adrian Östergård
This bug has been reported to our internal bug tracker for further testing and a fix. It is scheduled to be fixed in one of the future updates (no specific date can be provided).
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