Glass pane connected textures not rendering properly

[i0xHeX]

Env:

• Minecraft 1.15.2

Mods:

• Fabric API 0.7.1 b301 (1.15)
• OptiFabric 1.0.0-beta8
• OptiFine HD U G1 pre16 (also same with pre13)

Details:
Glass pane connected textures not rendering as intended if looking at East direction.
Setting connected textures set to Fast or Fancy gives no difference.

There are no such issues running single OptiFine without Fabric & OptiFabric.

[modmuss50]

Do you have the optifine internal resources enabled? in the resource pack window

[i0xHeX]

No

P.S. Enabled - now the glass pane connection is OK.

[i0xHeX]

Is that intended behavior or same should work without resources?

[grind651]

Yes, glass panels work correctly. But I have a problem with CTM Sanstone in the resource pack. Some sanstone blocks start showing default, with optifine internal resources enabled.