kioworker crash when saving files

[shujiejune]

• Searched existing issues to avoid creating duplicates.

• Confirmed that it can be reproduced in built-in themes without customized css.

  If it only exists in 3rd party themes or css, you can still report it, but please attach the theme target or the css file. We may not "fix" it, if it is caused by 3rd party themes or css styles that we cannot support.

• Searched http://support.typora.io/

---

Describe the bug
I installed Typora1.9.3 with the deb package from official website, on KDE Plasma 6.
Every time I tried to save files or export the current file to image, I got kioworker issue and failed.

To Reproduce
Steps to reproduce the behavior:

1. Download typora_1.9.3_amd64.deb to KDE Plasma 6 and put it in ~/.local/share
2. Install with sudo dpkg -i typora_1.9.3_amd64.deb in Konsole
3. Launch Typora with typora in Konsole
4. Randomly type some text like "abcde" in Typora
5. Save the current content with Ctrl-s, or click File - Save, or Click File - Export - [a random format in the menu]
6. See kioworker crashes constantly in the panel

Expected behavior
When I use Ctrl-s to save the file, or save / export the file through toolbar menu, the current file should be written to the disk and no i/o bugs reported.

Screenshots / Screencasts

Sample Markdown File
arbitrary markdown file, like "abcde" plain text

Desktop (please complete the following information):

• OS: TUXEDO OS 4
• DE: KDE Plasma 6

Typora Version
1.9.3

Additional context
I also tried to install Typora1.9.3 through flatpak, and run Typora with this command:
QT_QPA_PLATFORMTHEME=gtk3 flatpak run io.typora.Typora
Saving files failed as well. And below is the debug message in Konsole:
[2:0102/012836.707360:ERROR:bus.cc(407)] Failed to connect to the bus: Failed to connect to socket /run/dbus/system_bus_socket: No such file or directory
This kioworker crash doesn't appear with saving operations in Kate, KWrite, Neovim, LibreOffice Writter, Okular.