Not really a bug because this capability is not listed in the manual. But it's a pain nonetheless.
With PLOAD4, the solution has all-zero displacements.
SOL 101
CEND
DISPLACEMENT = ALL
SPCFORCES = ALL
SPC = 1
LOAD = 1
BEGIN BULK
GRID 1 0 0.0+0 0.0+0 0.0+0 0
GRID 2 0 5.0-1 0.0+0 0.0+0 0
GRID 3 0 5.0-1 1.0+0 0.0+0 0
GRID 4 0 0.0+0 1.0+0 0.0+0 0
GRID 5 0 1.0+0 0.0+0 0.0+0 0
GRID 6 0 1.0+0 1.0+0 0.0+0 0
MAT1 1 2.0+11 1.0+11 0.0+0 0.0+0 0.0+0 0.0+0
SPC 1 1 123 0.0+0
SPC 1 4 13 0.0+0
SPC 1 5 3 0.0+0
SPC 1 6 3 0.0+0
PSHELL 1 1 1.0-2 1 1 0.0+0
CQUAD4 1 1 1 2 3 4 0.0+0 0.0+0
CQUAD4 2 1 2 5 6 3 0.0+0 0.0+0
PLOAD4 2 2 -3.0+3
PLOAD4 2 1 -3.0+3
LOAD 1 1.0+0 1.0+0 2
ENDDATA
Here's the same file except PLOAD4 is changed to PLOAD2 and does give non-zero displacement where it should (T3 of GPs 2 and 3).
SOL 101
CEND
DISPLACEMENT = ALL
SPCFORCES = ALL
SPC = 1
LOAD = 1
BEGIN BULK
GRID 1 0 0.0+0 0.0+0 0.0+0 0
GRID 2 0 5.0-1 0.0+0 0.0+0 0
GRID 3 0 5.0-1 1.0+0 0.0+0 0
GRID 4 0 0.0+0 1.0+0 0.0+0 0
GRID 5 0 1.0+0 0.0+0 0.0+0 0
GRID 6 0 1.0+0 1.0+0 0.0+0 0
MAT1 1 2.0+11 1.0+11 0.0+0 0.0+0 0.0+0 0.0+0
SPC 1 1 123 0.0+0
SPC 1 4 13 0.0+0
SPC 1 5 3 0.0+0
SPC 1 6 3 0.0+0
PSHELL 1 1 1.0-2 1 1 0.0+0
CQUAD4 1 1 1 2 3 4 0.0+0 0.0+0
CQUAD4 2 1 2 5 6 3 0.0+0 0.0+0
PLOAD2 2 -3.0+3 2
PLOAD2 2 -3.0+3 1
LOAD 1 1.0+0 1.0+0 2
ENDDATA
Not really a bug because this capability is not listed in the manual. But it's a pain nonetheless.
With PLOAD4, the solution has all-zero displacements.
Here's the same file except PLOAD4 is changed to PLOAD2 and does give non-zero displacement where it should (T3 of GPs 2 and 3).