Measure ignoring slicer

I have a measure that counts number of projects missing value in a column. When no filters are applied in slicers all is well, but when I apply a slicer filter the count doesn't work. I've checked the interactions and they are not disabled.

The measue looks like this

Antal projekt saknar RE =
CALCULATE ( DISTINCTCOUNT ( ProjektLime[LimeID] ), ProjektLime[RE] = "" )

This gives me the same result

Antal projekt saknar RE =
CALCULATE ( DISTINCTCOUNT ( ProjektLime[LimeID] ), ISBLANK(ProjektLime[RE]) )

Applying this slicer setting RE to 1020 should give me the result 0 (or (Blank) ) in the corresponding card, but it says 234...

I really don't understand why, can anyone help me out, please?