Firework Rockets losing the "Flight Duration" Tag when Shift Clicked into the Enchanting Table

So what happened while I was playing in my Survival World was I was going to the Enchant Table to go enchant an item and I misclicked a Shift Clicked a Firework Rocket with Flight Duration 1 into it but when I took it out it just said Firework Rocket and didn't have the Flight Duration tag on it anymore I tried to put in manually though it kept the Flight Duration Tag but when I Shift Click it into the Ench. Table it loses the tag