Both enemy and allied mobs cannot pass or walk over the rails

As shown in the image, the two zombies seem to have a clear path to reach me, however, the only thing completely blocking their path is the rail at their feet

To reproduce this issue, simply place rails on the ground and you'll see how the mobs prefer to go around the rails instead of directly passing over them

I don't know if this is a bug, but I consider it to be one since it doesn't make much sense that both enemy mobs, such as a Creeper, and allied mobs, such as a pet wolf, etc, are unable to pass over the rails