prefix not added to xwiki.db

We noticed a behavior change in database name handling between XWiki 9.11.8 and XWiki 11.10.10

in XWiki v9, in xwiki.cfg , with:

xwiki.db=main
xwiki.prefix=xwiki_

The main database name was resolved by the system to the contatenation of both : xwiki_main

In XWiki 11.10.10, I need to put :

xwiki.db=xwiki_main
xwiki.prefix=xwiki_

For the main database to get selected properly. Other wise I get the following error:

Caused by: java.sql.SQLException: Could not select database 'main' : Access denied for user 'xwdev'@'localhost' to database 'main'

To reproduce, download XWiki war, unpack in the application container, create a database xwiki_main & user as stated in the documentation, tweak the hibernate conf then put in xwiki.cfg:

xwiki.db=main
xwiki.prefix=xwiki_

PS: hibernate should contains something like

<property name="hibernate.connection.url">jdbc:mariadb://localhost/xwiki_main</property>

PS: First inspection with tmortagne led to https://github.com/xwiki/xwiki-platform/blob/master/xwiki-platform-core/xwiki-platform-oldcore/src/main/java/com/xpn/xwiki/internal/store/hibernate/HibernateStore.java#L339