Little Genius - Linux (.deb) version v0.5.5 - Default notification sounds do not play

Going to Settings -> Notifications and clicking play while selecting any of the default sounds do nothing. Adding a custom sound and clicking play on them seem to work.

System info:

Operating System: Kubuntu 26.04 LTS

KDE Plasma Version: 6.6.5

KDE Frameworks Version: 6.24.0

Qt Version: 6.10.2

Kernel Version: 7.0.0-27-generic (64-bit)

Graphics Platform: Wayland

Processors: 4 × Intel® Core™ i5-4690K CPU @ 3.50GHz

Memory: 16 GiB of RAM (15,5 GiB usable)

Graphics Processor 1: AMD Radeon RX 9060 XT