Sandstone and red sandstone walls have side texture on the top and bottom faces

Still affecting 19w13a/b and probably 19w12b, if I remember correctly.

Affects 19w14a

Affects 19w14b

Confirmed for 1.14 pre-release 1

Still an issue both in 1.14.4 and 1.15 pre2

Confirmed for 20w06a.

There are two possible fixes for this: one is really easy and not really a fix, which is using the bottom texture instead of the side texture. The other one requires creating "template" models for walls which support 3 different textures and then using those templates for sandstone and red sandstone wall models. These fixed models are included in the attached resource pack.

Affects 20w11a

It also affects blackstone walls, the side texture is used in every face

Made a new ticket for blackstone walls (MC-182383) since it's unclear whether the bottom face is correct or not (see MC-177839).

Can confirm in 20w51a.

Can confirm in 21w03a.

Can confirm in 21w05a.

Can confirm in 21w06a.

Can confirm in 21w07a.

Affects 1.17.1

Affects 1.18

Affects 1.18.1

Affects 1.18.2

Affects 1.19 pre-release 1

Affects 1.19

Can confirm in 1.19.2.