Problem with citations in footnotes in OpenOffice

I have observed following problem in OpenOffice v. 2.2 and also v. 3.0:

when I add a single citation in a footnote (either one created by Zotero or by me manually) and then try to type in some text (e.g. " ; " as a separator for the following citation) it always remains part of the citation. So when I click on the Refresh button of the Zotero Plug-In my text disappears.
This problem appears only in the footnotes, not when I add a citation in the page itself.

In MS-Word there is no such problem, so I presume that it has to do with the OpenOffice Plug-In of Zotero 1.5 Sync.

Thank you in advance.
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