Reactive selector of meteor-tabular never stops "reloading"

I use a simple session variable passed via template helper to tabular tables.

{{> tabular table=TabularTables.Languages selector=languageSelector}} 

languageSelector: function () {
    return Session.get('languagesListFilter');
}

The problem is the subscription which is “killed” again and again.

Visually you can see the rows background flickering.

Anybody had the same issue?