Sometimes, when you assign a large amount of villagers to construct walls, villagers can call “dibs” on their wall segment making it impossible for other villagers to manually quickwall it. This can have devastating even in pro games where there have been instances of quickwalling not working when the villager calling “dibs” on a segment is far far away. My apologies if this is already adressed.
Thanks @UnrulyHornet524! We’ll take a look.