This is a rare bug to encounter, but it did happen, so I'm gonna report it here. It will freeze after letting go of your mouse at the end of the song.
The window was maximized on my second monitor, and the window could not be moved after it froze.
Here's a video of many failed reproductions of this bug:
https://files.catbox.moe/u6w67j.webm
Device information: Linux debOWO 6.12.38+deb13-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.12.38-1 (2025-07-16) x86_64 GNU/Linux
KDE Plasma Version: 6.3.6
KDE Frameworks Version: 6.13.0
QT Version: 6.8.2
Linux Kernel Version: 6.12.38+deb13-amd64 (64-bit)
Graphics Platform: Wayland
CPU: 12 × 13th Gen Intel® Core™ i5-1335U
Memory: 32 GiB of RAM (30.9 GiB usable)
Graphics: Intel® Iris® Xe Graphics (Integrated), llvmpipe
System: LENOVO ThinkBook 16 G6 IRL (21KH)