Submap editor doesn't work

[Dodo98]

Hey everyone,

I wanted to edit some map labels in a modern campaigns title using the submap editor but I just can't get it to work properly. If I delete an existing label and save the map it is still there if I load the map again. Any idea why I can't delete the labels? The same problem applies when I wan't to modify an existing label, for example fix some typos. I follow exactly the procedure outlined in the manual but the old label is still there if I load the map again. The only thing that works is adding new labels.