No semicolon in CSV export

Hello,

I'm actually setting up a second instance of ProjeQtOr for testing and migration. Now I have the problem that when exporting components within new instance using ; as delimter the semicolon is missing within the export file. In the old instance it works.
I can't find the difference in both systems (I'm using a docker container which I copied from one PC to another with same but newly installed OS).

Any sugestion were I can search for the reason?

Thanks
Ronny 

In global parameters as well as in export window ; is set as separator. Nevertheless any separator is missing within export file.

Another thing I observed: Changing delimiter to comma within export window is stored an reloaded again when trying another export. Changing it back to semicolon shows empty separator when opening export window for another export...

Do you have any further suggestion regarding this issue? We want to use import and export but semicolon still doesn't work and when exporting using comma the columns are "jumping" around because comma seams not to be the same in each row.