Hitbox detection bag

I faced such a problem: when forming a hitbox LARGER than the block size, the hitbox is formed correctly (I can't go where I shouldn't), BUT pointing at the hitbox area OUTSIDE the main block, the hitbox disappears. I.e. I have a conditional block of 1x2 size, I can place it, it will have the correct properties of the hitbox, but I can ONLY BREAK the block by pointing at the main block. The illustrations below are: (lime is the main block, red is the blocks around where the hitbox was stretched)
 

Write if you have the same problem. I know how to solve it - write code so that when setting up a picture, always (if there are no other blocks) an empty block is placed to the left of the main block (in my case), the hitbox of which will be correct to the model.

I hope this is a single mistake and others are fine with it))

Original text - russian, sorry for issues