I've tried to use the stairs from industrial renewal mod in city buildings, where I discovered all stairs pointing south (industrialrenewal:catwalk_stair) was instead pointing north (industrialrenewal:catwalk_stair:2). All other directions has no problems.

The vanilla setblock command has no issues, so I wonder if there is a issue with default blockstate handling with lost cities?

For reference Cassiobsk8/Industrial_Renewal#29

That's not the correct notation for meta: industrialrenewal:catwalk_stair:2
Should be industrialrenewal:catwalk_stair@2

That's not the correct notation for meta: industrialrenewal:catwalk_stair:2
Should be industrialrenewal:catwalk_stair@2

Yes I did use this @ notation in json files, I also noted that there are no issues with other directions

Also in the part definition, I've tried both industrialrenewal:catwalk_stair and industrialrenewal:catwalk_stair@0, both are facing north instead of south(as it should be).

Show me your palette json

Here is the part involved
https://gist.github.com/wormzjl/1388d25e8a18275a9f3328dddb744dee

I can send you the full config pack if you wish

Ok so this issue happens with vanilla blocks too.
I have some stairs which should be facing east (minecraft:brick_stairs)
But in generated structures they are actually facing north (minecraft:brick_stairs@3)
Updated title

Screenshot: