The Bug:

The "/fill" command doesn't work properly with the directional states of several blocks placed adjacent to one another.

Steps to Reproduce:

1. Attempt to place some fences that are all facing north by using the command provided below.

   /fill ~1 ~ ~1 ~5 ~ ~5 minecraft:oak_fence[north=true]

2. Observe if the fences have block states other than "north" set to "true".

Observed Behavior:

The said blocks do not follow the specified block states properly.

Expected Behavior:

The said blocks would follow the specified block states properly.