Chosen Solution
So I just did an digitizer change on an iPad mini 2 and now I have a super-sensitive home button. Any one knows why? I just have to lay my finger on it an it will react. Double tapping it will bring up Siri. Also putting some pressure on the right side of the home button on the glass will give the same reaction as to using the home button. Some problem with grounding points?
Use the home button that on previous touch,The new one with touch not working well i also faced that issues before.
Did you reuse the old home button? The new digitizer May have a slightly uneven or differently sized hole or button. It could have uneven pressure on it.