Touchpad Left Click Button Partially Sticky

Dell Inspiron 17R 5737: A few months ago the left click button of the touchpad got deflated from bottom left edge and the click got sticky, if I clicked on right top edge, it worked sometimes but mostly left click stayed pressed.

I opened the laptop and found that the small plastic attached to the button, which inflates it back is broken. I tried to fix it using glue but it didn't work. As it was part of the whole Palmrest thus I ordered a new palmrest. After receiving the new palmrest, I detached the buttons circuit and touchpad circuit from the old palmrest and attached it to the new palmrest.

Strangely now, the left click button is partially sticky, if I click on the left half of the button it sticks, if I click on the right half of the button it works properly 90% of the time. The button is no more deflated and it inflates and deflates properly on clicking, there is nothing broken in the new palmrest, the clicking sound is fine, there is just 1 button for left click then how it is working differently for left half and right half, that I am not able to understand.

Next step can be to order new buttons circuit but I am not sure if this will fix the problem.

This is my work laptop thus it is effecting my work and time quite badly, any help will be highly appreciated.