BUEditor missing on add/edit pages

There's an issue with BUEditor 6.x-2.7 for me. I've updated the code and cleared the cache yesterday and now there's only one editor panel at every add/edit form page even if there're two textareas (teaser and main content) there. There's nothing special in JS console, I checked css and js loaded and it seems to me both files were from the new version of the module (I used diff to make sure they were).

I don't know what to do to make the module work again so as a workaround I decided to replace the new version of the module (6.x-2.7) with the older one (6.x-2.6) and to clear cache again. Now BUEditor works again.