Filtering using "team" field breaks my board... why?

[Michael Rozenberg]

Hi,

I'm using the following JQL query to filter a swimlane on my scrum board in Jira.

(type = Story OR type = Bug) AND Team not in (4)

For some reason, the query breaks the board so that when I click save and view my board afterwards, I can see all my columns but

• the little expand/collapse arrow is gone - I can't collapse the swimlane
• the everything else swimlane is gone
• the filter does not actually work.

If I switch to another team ("AND Team not in (6) for example), the query runs fine. 

Any idea of what might cause this?