Calling NullspaceMat with Matrix Object on Zero/Invertible Matrix behaves unexpectedly #6622

gap> A := Matrix(IsPlistMatrixRep, GF(5), [ [ 0*Z(5), 0*Z(5), 0*Z(5), 0*Z(5) ], [ 0*Z(5), 0*Z(5), 0*Z(5), 0*Z(5) ], [ 0*Z(5), 0*Z(5), 0*Z(5), 0*Z(5) ], [ 0*Z(5), 0*Z(5), 0*Z(5), 0*Z(5) ] ]);
<4x4-matrix over GF(5)>
gap> NullspaceMat(A);
[ [ Z(5)^0, 0*Z(5), 0*Z(5), 0*Z(5) ], [ 0*Z(5), Z(5)^0, 0*Z(5), 0*Z(5) ], [ 0*Z(5), 0*Z(5), Z(5)^0, 0*Z(5) ],
  [ 0*Z(5), 0*Z(5), 0*Z(5), Z(5)^0 ] ]
gap> NullspaceMatDestructive(A);
[ [ Z(5)^0, 0*Z(5), 0*Z(5), 0*Z(5) ], [ 0*Z(5), Z(5)^0, 0*Z(5), 0*Z(5) ], [ 0*Z(5), 0*Z(5), Z(5)^0, 0*Z(5) ],
  [ 0*Z(5), 0*Z(5), 0*Z(5), Z(5)^0 ] ]

gap>  A := PseudoRandom(GL(4, 5));
   NullspaceMat(A);[ [ 0*Z(5), Z(5)^3, Z(5)^2, Z(5) ], [ Z(5)^2, Z(5)^2, 0*Z(5), 0*Z(5) ], [ Z(5)^0, 0*Z(5), Z(5)^2, Z(5)^3 ],
  [ Z(5)^2, Z(5)^2, Z(5), Z(5)^0 ] ]
gap>       A := Matrix(IsPlistMatrixRep, GF(5), A);
<4x4-matrix over GF(5)>
gap>       NullspaceMat(A);
[  ]
gap> NullspaceMatDestructive(A);
[  ]