Issue with partial @import

[asifshirazi]

I'm using PreCSS pack for import. Let me briefly explain what is happening with me.
When I run my gulp task it will adds @keyframes only for the first file.

_partial.pcss

.foo {
    animation: bounce 1s;
}

app.pcss

@import "partial";
h1 {
    font-size: 1.5em;
}

style.pcss

@import "partial";
p {
    margin: 0;
}

In my case it will adds .foo keyframes only in app.css and ignores rest of the files.