qBittorrent can't start on KDE Plasma 6 with StartUpWindowState=Hidden

[OlegAckbar]

qBittorrent & operating system versions

qBittorrent: 4.6.4 x64 Operating system: Arch Linux Qt: 6.6.2 Libtorrent: 2.0.10.0 Boost: 1.83.0 OpenSSL: 3.2.1 zlib: 1.3.1

What is the problem?

When I switch "Startup window option" to "Hidden" qBittorrent can't start anymore until I remove that option from qbittorrent.conf.

Steps to reproduce

1. Start qBittorrent
2. Set Window state on startup to Hidden
3. Close qBittorrent
4. Try to start it again (it won't)

Additional context

Here's a video with demonstration: qbittorrent.webm

Log(s) & preferences file(s)

Then only logs I have of this crash are in journalctl. Application don't provide any output even when ran from the terminal.

апр 07 22:50:34 oleg-pc systemd[668]: Started qBittorrent - Клиент сети БитТоррент.
апр 07 22:50:34 oleg-pc kded6[14854]: Registering ":1.275/StatusNotifierItem" to system tray
апр 07 22:50:34 oleg-pc plasmashell[14914]: QFont::setPointSizeF: Point size <= 0 (0.000000), must be greater than 0
апр 07 22:50:34 oleg-pc kded6[14854]: Service  ":1.275" unregistered
апр 07 22:50:40 oleg-pc kded6[14854]: Registering ":1.278/StatusNotifierItem" to system tray
апр 07 22:50:40 oleg-pc plasmashell[14914]: QFont::setPointSizeF: Point size <= 0 (0.000000), must be greater than 0
апр 07 22:50:40 oleg-pc kded6[14854]: Service  ":1.278" unregistered

Here's qbittorent.log stripped of (N) Restored torrent. Torrent: ... messages qbittorrent.log

[OlegAckbar]

I've just tried fresh install of qBittorrent on my fresh VM with Arch Linux KDE and I'm having exact same issue meaning that it's not cause by my config.

[thalieht]

Duplicate of #20516