sass format is broken when I type border-radius in vscode

I want to add border-radius to a element in my scss file.
before:

.card {

    &__side {
        height:50rem;

        &--front {
            background-color: orange;
        }
    }
}

after:

.card {
    border-radius: ;
        &__side :;
    -webkit-border-radius:;
    -moz-border-radius:;
    -ms-border-radius:;
    -o-border-radius:;
{
        height:50rem;

        &--front {
            background-color: orange;
        }
    }
}

the format is corrupted.I want to fix this in vscode.anyone can help me?thanks!!!!!
the same thing happen when the vscode auto-generate -webkit-border-*:; -moz-border-*:; -ms-border-*:; -o-border-*:;property.