Choir Labelling is off when condensing is activated

Hi,

In a big score I am working on the Choir sometimes is condensed and sometimes few voices are separated out (Screenshot 2). When separated out the Staff labelling (in this case for Soprano and Alto) are misplaced, with no option to make them be placed correctly (compare the T. /B. placing and the S./A. placing). Does somebody know how to fix this or is this just a bug?