I found the problem which was a bend ribbon cable, When I put back the display I didn't pay attention on the ribbon cable which was at the edge of the phone, I don't remember this happening to me before because the length of the ribbon should be long enough to install the display and keep it away from the edge when folding it.
I tried to stretch back the ribbon cable to its original shape by rolling the top of the iFixit screw driver on it like someone preparing a pizza and it worked to some extend, any slightest movement during the assembly will cause the problem to reappear, I had to avoid putting back some metal components and try to put all ribbon cables without bending them, instead of having the display and housing at 90° I had to install everything at around 45°, even then the problem isn't fixed yet, I added some toilet paper to secure the ribbon and finally it worked like a charm.