Minecraft 1.15.2, Paper Bukkit: Copy stair blocks the way they are?

If I want to copy the staircase blocks as they are in 1.15.2, for example they look west, then all copied staircase blocks look north. How can you fix this or do you have to write something behind / copy or / paste or is it because the software is Paper Bukkit? When I did that in the 1.14.4 Spigot Bukkit version, everything was still working.

You can simply use the command / clone, the stairs are turned in the right direction.