Oh I just added " " in the module. and a client.xml in assets

<box width="100%">
    <label id="info_client" text="Info Client : " verticalAlign="center" horizontalAlign="right" styleNames="client-name"/>
</box>

in the builder and it does the same bug . Now for some reasone there isn't an adress to the the project anymore in the builder ( in chromium and firefox) so I can't give you the link