When launching custom versions from vanilla launcher like Fabric, OptiFine you'll notice it'll show up as Minecraft 1.8.9 (OptFine_FOO_BARR/vanilla) at top of the debug menu. MCLC was using options.number instead of options.custom and it was causing that problem.
When launching custom versions from vanilla launcher like Fabric, OptiFine you'll notice it'll show up as Minecraft 1.8.9 (OptFine_FOO_BARR/vanilla) at top of the debug menu. MCLC was using options.number instead of options.custom and it was causing that problem.