Please tell us your
- Operating system
- LibreOffice version
- Desktop manager (KDE, GNOME, LXDE, Xfce, …), if you are on Linux
- Storage device (local, disk, NAS server, cloud service) and
- Setting of option
Tools -> Options -> LibreOffice -> General -> Option: [ ] Use LibreOffice dialogs
(or LibreOffice -> Preferences -> LibreOffice -> General -> Option: [ ] Use LibreOffice dialogs
, if you are on macOS)
Why asking?: This doesn’t happen on my system using Linux, KDE Frameworks 5, system dialogs and LibreOffice (6.2.6, 6.3.6, 6.4.7, 7.0.6 and 7.1.4)
Please do **not** use *Add Answer* but **[edit](https://ask.libreoffice.org/t/filename-when-saving/65278)** your original question to enhance the details of your question and/or to upload sample file(s) (answers are reserved for solutions to a problem on this Q&A site). Thanks in advance …