I have a project with my issues assigned to several Epics and tagged with a label. I have a scrum board set up with this filter query:
'project = "AS" AND (issuetype not in ("Xray Test", "Test Set") AND labels is EMPTY) ORDER BY Rank ASC'
And swimlanes based by Epic, which works perfectly. I can see any issue that has no label and is not an Xray Test or a Test Set. It looks like this

But when I try to set up the exact same board with this filter:
"AS" AND (issuetype not in ("Xray Test", "Test Set") AND labels is not EMPTY) ORDER BY Rank ASC'
And base my swimlanes by Epic. The board shows nothing. I have no idea what I'm doing wrong.

Any ideas that may help?
Thanks!
Emmanuel