The villagers do not see the mod blocks and therefore try to pass through them, which stops them in their path. The error occurs in 1.19.4. On the linked image, the villager jumps on the spot, trying to pass the quarter block.

Can't make sure that is the bug of the mod. If you persists please reopen.

Hi, i have also encountered this bug. Swapping out the vertical slabs from extshape with ones from a different mod fixes the issue, so it is an extshape bug.

On closer inspection, the difference between the extshape slab and the other mod seems to be a option called "single_slab: true". Extshape slab does not have this option at all.