Translation seems to be broken

[andrey-programmist]

What you were expecting:
Notifications and tooltips would be translated in corresponding language.

What happened instead:
Component shows translation key instead of translated phrase.

Sample code:
I use custom i18n provider like this:

import russianDomainMessages from './i18n/ru';
import russianMessages from 'ra-language-russian';
const messages = {
  ru: { ...russianMessages, ...russianDomainMessages },
};
const i18nProvider = locale => messages[locale];

const App = () => (
    <Admin
      locale="ru"
      i18nProvider={i18nProvider}
    >
        ...
    </Admin>
);

Helper info
translate HOC works fine.

Environment

• React-admin version: 2.8.1
• Last version that did not exhibit the issue (if applicable): 2.7.2

[andrey-programmist]

Can't reproduce after clean cache and yarn reinstall