Wrong Filter from PlanningBoard to JQL

If i'm watching the planning-board there are some statistics on the right site.

If i'm clicking on a bar (view screen: filterlink.jpg) the "SearchIssue" window appears with an JQL-error.

The error said that there is no field named "Vorgangstyp".
"Vorgangstyp" is the translated word for issuetype.

So my first idea was that JQL cant take the default language, where Vorgangstyp is the same like issuetype, so i switched my profile language to english and clicked the same bar with the same filter.

Another JQL error appears whith "no field like "issue type".
True. It's not "issue type", its "issuetype" without that space.

So where is the error now and how to solve that problem?