In any Belarusan language wikiproject (except Wikipedia) the newly added sidewiki links mailfunctioning: interwiki to the be-tarask Wikipedia never being displayed.

Example for Wikisource:

1. Page Вацлаў Ластоўскі;
2. There are interwiki links to the Wikimedia Commons, bewiki and Wikiquote, but not to the be-taraskwiki (where article exists).

Example for Wikiquote:

1. Page Вацлаў Ластоўскі;
2. The same interwikis to the Wikimedia Commons, bewiki and Wikiquote, but not to the be-taraskwiki.

Obviously there is a problem because of two Belarusan Wikipedia projects, so that a waiver needed for "be-tarask" code.