The bug
You can see inner walls of beam instead of outer walls of beam on the lower part of end gateway block beam.
You can see inner walls of beam instead of outer walls of beam on the lower part of end gateway block beam.
(Unassigned)
Confirmed
Low
Rendering
20w10a, 20w17a, 1.16 Pre-release 2, 1.16 Release Candidate 1, 1.16, 1.16.2, 1.16.3, 1.16.4
20w48a
Retrieved
This issue seems to be fixed in 20w48a. I've attached a screenshot which shows proves this statement.