Translation bar not appearing on pages when URL is typed / pasted

[kpu]

1. Use 25503dc with directions in the README.md and an en-US speaking nightly
2. Paste a Russian URL into the bar (I used Linux middle click) say https://ru.wikipedia.org/wiki/%D0%A1%D0%B0%D0%BC%D1%87%D0%B5%D0%BD%D0%BA%D0%BE,_%D0%93%D0%B5%D0%BE%D1%80%D0%B3%D0%B8%D0%B9_%D0%94%D0%BC%D0%B8%D1%82%D1%80%D0%B8%D0%B5%D0%B2%D0%B8%D1%87
3. Hit enter.
4. Page renders but no bar appears.
5. Go to another tab, type es.wikipedia.org and again no bar appears
6. Click a link and observe that the extension is active.
7. Return to that original Russian URL and hit enter in the URL field. The bar appears.