About the Double-Press Type of Sonoff mini R2

[tsgxwolf]

I added a spring to the switch on the wall,so made my switch into a Double-Press mode.
It works,but there's a delay after the Double-Press.
(If I Press the First and wait for a second to the second press,then there's no delay to lights on.)
May I ask what cause the delay?
And this is my MEPLHAA Script:

{"c":{"io":[[[13],3],[[0,4],6],[[12],2]],"l":13,"b":[{"g":0,"t":5}]},"a":[{"0":{"r":[{"g":12}]},"1":{"r":[{"g":12,"v":1}]},"b":[{"g":0},{"g":4},{"g":4,"t":2}]}]}

[tsgxwolf]

Could anyone help?