Copying a document via XWiki#copyDocument with reset option activated sometimes keeps the source document history

Steps to reproduce

In main wiki with single language:

• Create page "Sandbox.ABC.WebHome" and edit it several times so that it has several major versions.
• Copy "Sandbox.ABC.WebHome" to "Sandbox.ABC1.WebHome" via XWiki#copyDocument(String docname, String targetdocname, String sourceWiki, String targetWiki, String wikilocale, boolean reset, boolean force) with "reset" and "force" arguments set to true in a Velocity script, using the same source and target wikis, and "locale" set to "$NULL".
• In some cases the document copy operation needs to be executed for two distinct target documents before the bug gets fired (on the second target only).

Expected result

The target document has a single version: 1.1.

Actual result

In the history tab of the target document, the versions of the original document are shown. However when flushing XWiki cache, the history of the target document shows only one version: 1.1 as expected, when the wiki is single language. When the source document has one or several translations, the translated target documents keep the source history even after the cache is flushed. I have not checked what the xwikircs table contains for these documents.