Help With Custom Torch

I am making new torch variant and I got almost everything done but one thing make it impossible to work properly.

this is procedure for neighbour block change:   https://imgur.com/a/2PfLHZ1

and here is the problem on video:   https://youtu.be/70UOLp0OoBs

if you have any advice to prevent it from atuo breaking then please help xddd

(this is one block with 5 blockstates)