Odd shading on roof blocks

[TheAvidSmoker]

When placing the roof blocks the shading is very off when touching regular blocks. but only on the inside of the roof and bottom of the roof tile.

Forge & Minecraft version

Minecraft 1.17.1 
Forge 37.1.1
Singleplayer
Shetiphian core 3.9.16

Modlist

Serene Seasons 1.17.1-5.0.0.7
Double Doors 3.3
Swing Through Grass 1.17.1-1.6.0
Ambient Sounds 3.0.3
Biomes O' Plenty 1.17.1-14.0.0.43
CreativeCore 2.3.0
Platforms 1.8.9
JEI 8.3.1.1.1002
Extended Slabs+ 2.0.0
Chisels & Bits 3.9.16
Collective 4.25

• No Shading issues without the mods, and the issue persists with only Platforms and ShetiPhian core.

• No crashes, Logs provide nothing useful

[ShetiPhian]

In the forge-client config try experimentalForgeLightPipelineEnabled = false I remember it fixing obj models but breaking json models with small/many faces.

Looks like that was back in 1.15, but there is a open issue for 1.19.2 about it not shading partial faces correctly, and a pull request to remove it in 1.21.3