More than one XmlListModel - Lists randomly show data from wrong model

I'm using more than one XmlListModel simultaneously, each having its own ListView to show the data.

From time to time (annoyingly often but not nearly every time, perhaps one out of 20 times) I see that the data gets mixed up: List A is showing data from model B (and usually List B still shows data from model B).

All XmlListModel's source's are some http://..... urls.

The ListViews don't get their model changed at any time - they are just set once, but models source is updated rather frequently based on user action.
XmlRole names are all different for each model (although some of the queries are the identical), still the delegate A sometimes shows data from delegate B.
Source url for each XmlListModel are also unique.

When this happens, there are some XPath syntax errors (XPST0081) on the logs, because the XmlListModel's have different namespace definitions and requirements.

Error XPST0081 in file:///usr/bin/applauncherd.bin, at line 2, column
122: No namespace binding exists for the prefix gd in gd:comments
Error XPST0081 in file:///usr/bin/applauncherd.bin, at line 2, column
122: No namespace binding exists for the prefix media in media:group

The namespaces in the errors above, from model A, are set and required only for model B.