Okay I dont know if this is a bug or just something not implemented into the mod but here's the "issue"

I'm doing a specific build that was done in 1.16 and when placing the walls this way, it would create an actual wall, instead of those kind of pillars as shown in the pic, it would be nice if this could be fixed/added, though it is just a minor inconvenience imo

1.16 introduced the wall that vertically merged ('tall' wall) so likely a request rather than a bug?