1) Export to CSV ignores value stored in the LibreOffice configuration and allways uses comma , while in configuration is set up delimiter as ; 2) Export to CSV don't remember last setup whwn saving minute before, so when setting up export with details and set it to ; next time I hit save (and don't go again to setup) it uses as separator , again This is very frustrating and unpredictable. Especially part 2) whwn allways when saving you muste remebere to go to advanced setup and set separator...
It was probably just temporary bug, probably showing just during one run of LibreOffice whwn something hanged or due to special file, after rebooting machine, it seems ok. If it continues, I would reopen this issue.