Camel-SAP endpoint not recovering from a data exception

When receiving an non-well-formed XML document from an upstream system, the SAP RFC destination endpoint XML parser throws an org.xml.sax.SAXParseException, but still calls SAP, without data (since these cannot be parsed). It is broken after that.
Subsequent valid documents will not be processed correctly. Instead, the SAP RFC destination is again called without data. There's no exception in the deserializer, though.