The "1.json" within "models/block/smooth_red_sandstone" references the non-existent texture "block/smooth_red_sandstone" while 2-4 reference the also non-existent texture "block/smooth_sandstone".
I assume they are supposed to reference "block/red_sandstone_top" to follow the convention set by Smooth Sandstone.
Description of bug
The "1.json" within "models/block/smooth_red_sandstone" references the non-existent texture "block/smooth_red_sandstone" while 2-4 reference the also non-existent texture "block/smooth_sandstone".
I assume they are supposed to reference "block/red_sandstone_top" to follow the convention set by Smooth Sandstone.