Eternal Cache of keysets

[blond]

Lang files with keysets:

.
└── block/
    └── block.i18n/
        ├── en.js
        └── ru.js

How to reproduce:

1. Run server.
2. Open en page. See — Hello!.
3. Change en.js file: Hello! to Hi!.
4. Reload page. See — Hello!.

It was expected that on the 4th step will see the Hi!.