Poezio renders illegal bodies with same xml:lang
<message xml:lang="en" type="groupchat" to="pep@bouah.net/poezio-C7iY" from="xsf@muc.xmpp.org/balu_der_baer" id="9404194170754fe487e6f89d8f4c87ed"><body xmlns="broken">⚠ Your client renders the body of a broken namespace.</body><body>⚠ Your client renders a first body when it shouldn't</body><body>⚠ Your client renders a second body when it shouldn't</body><stanza-id xmlns="urn:xmpp:sid:0" by="xsf@muc.xmpp.org" id="2019-09-11-869b4f1282d0a054" /><origin-id xmlns="urn:xmpp:sid:0" id="9404194170754fe487e6f89d8f4c87ed" /></message>Poezio renders "
This is not a valid stanza as per (https://xmpp.org/rfcs/rfc6121.html#rfc.section.5.2.3)[https://xmpp.org/rfcs/rfc6121.html#rfc.section.5.2.3] as it contains multiple <body xmlns="jabber:client" /> elements with the same xml:lang attribute (inherited by the parents).
This may also be a slix issue.