After using fill command to fill iron railings, iron railings will not be connected.

the 26 report

When I was building a park on the farm, I found a flaw in the iron railings. When iron railings are filled with iron railings with (setblock/fill) order, the iron railings on the other side will not be connected.

Steps to Reproduce:

Material: iron railings, any square

1. the height of the iron railing is 3
2. place the square on the other side of the iron railing, as high as 3.
3., use the /fill XXX XX XXX to set the lowest box (not iron railings) for you.
4. then increase the Y axis by 3 grids (if you place a minimum of 59, the highest is 61).
5., please write "iron_bars" in the back.
6. you will find that the iron railing is not connected.