1.12.2 is the only version that optifine is broken in for me. Optifine_1.12.2_HD_U_F5, Sildurs Vibrant Shaders v.1.22 Lite. I have tried this with every shader pack and each one is affected by
Shaders for Minecraft 1.12.2
Stazza's Super Shaders Mod for Minecraft 1.12.2/1.11.2 | MinecraftSix
SFLP Shaders (1.19.4, 1.18.2) - Shaders for Low End PC's - 9Minecraft.Net
Sildur's Shaders 1.12.2/1.13.1 pack for Minecraft - amazing effects
BEST SHADERS FOR 1.12+! (Low End PCs/High FPS) 2017 | MINECRAFT 1.12 - 1.12. 2 - YouTube
Sildur's Vibrant Lite for Minecraft 1.17
Builders QOL Shaders 1.19.4 > 1.8 - Shaderpacks
Lite - Optimized Low Shaders For Minecraft 1.19.4, 1.19.2 | PC Java Mods
BEST High FPS / Low-End Shaders 2017 | Minecraft 1.12.2 - YouTube
There are so many shader packs and mods out there that the Shaders Mod 1.12. 2/1.11.2 might easily be over… | Minecraft shaders, Minecraft addons, Minecraft projects
Sildur's Shaders Mod for Minecraft 1.17/1.16.5/1.16.4/1.15.2/1.14.4 | MinecraftSix