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O540 upstack fuel injector leaking

I’ve noticed that one of my injectors leaks a drop or two of fuel when I shut the motor down. Is this normal? I took the fuel line off cleaned were the male and female meet but it still leaks.
 
I’ve noticed that one of my injectors leaks a drop or two of fuel when I shut the motor down. Is this normal? I took the fuel line off cleaned were the male and female meet but it still leaks.
Not an issue, kinda wondering about the other 5, why they don’t? More than likely the one that leaks runs near your header. Once past the fuel valve there is no going back. Fuel expands, gets pushed through the injection nozzle and leaks out of the air mixing screen.

All of mine do it, I think it helps keep the screens clean. Here is a good run down on the basics.

Aircraft Reciprocating Engine Fuel Injection Systems
 
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