bug: Font DPI Issue

[nemonein]

System Details
OS: Archlinux
Arch: x64
Desktop Environment: KDE
Version: v3.4.0
Installed by: Archlinux AUR

Describe the bug
I'm using 2560*1440 Monitor, and cantata's UI is too small for the screen.
So I start cantata with QT_FONT_DPI=120 cantata.
It works fine, but there's something wrong.

Please take a look at the screen shot.
https://github.com/user-attachments/assets/98f38648-0efc-478f-abc3-0e63e0e0b236
When I move the mouse pointer, Cantata shows info about the track. However it disappears soon.
The time info is also blinking and the font is blurred.

So, what I want are..

• Is there a way to increase the font(UI)?
• Is QT_FONT_DPI not working on Cantata?