Apologies for this being a duplicate, but this issue extends to Optifine as well. Regular animated textures seem to work, but Optifine has support for emissive (glowing) textures. If those textures are animated and texture optimization is turned on, they only render the first frame as a static overlay.
Optifine 1.12.2_HD_U_G5
VanillaFix 1.12.2 1.0.10-150