No, it's not normal. You might try opening and reclosing the valve. Sometimes it will re-seat and not leak anymore. OTOH, it might leak worse. You can always replace it. It is not too expensive.
Chuck - Sparta, TN
2012 Jay Flight 22FB, 2 x Honda EU2000i
2013 GMC Yukon XL Denali AWD
EDUCATION is what you get when you read the fine print.....
EXPERIENCE is what you get when you don't.