Text display mixin changes md font at a different breakpoint than other display mixins

```
@mixin text-display-lg {

    @media #{$mq-md} {
        @include font-size(48px);
    }
}

@mixin text-display-md {

    @media #{$mq-lg} {
        @include font-size(40px);
    }
}

@mixin text-display-sm {

    @media #{$mq-md} {
        @include font-size(32px);
    }
}
```