Uh, i think a got a trace... i installed plugin "siteexport" recently, and this is using sortorder 100. This plugin uses several syntax additions and this one attracts my attention:
function connectTo($mode) {
$this->Lexer->addEntryPattern('<toc>(?=.*?</toc>)', $mode, 'plugin_siteexport_toc');
$this->Lexer->addEntryPattern('<toc .+?>(?=.*?</toc>)', $mode, 'plugin_siteexport_toc');
$this->Lexer->addSpecialPattern("\[\[.+?\]\]", $mode, 'plugin_siteexport_toc');
}
Later on in code, it is handled with
if ($this->insideToc) {
....
} else {
// use parser!
$handler->internallink($match, $state, $pos);
}
Here we have a conflict. I assume that handling the same syntax in a cascade is not possible, so link-handling ends here!
As i disable the plugin, everything works like expected. But this can happen again, anytime...