SUMMARY
When current page is Now Playing and there is a background in the Now Playing frame, click Show Playlist will make the background flicker.

STEPS TO REPRODUCE
1. Play a song with an album art.
2. Click Now Playing
3. Click Show Playlist

OBSERVED RESULT
The background flickers.

EXPECTED RESULT
The background doesn't flicker.

SOFTWARE/OS VERSIONS
Operating System: openSUSE Tumbleweed 20210920
KDE Plasma Version: 5.23.80
KDE Frameworks Version: 5.87.0
Qt Version: 5.15.2
Kernel Version: 5.14.5-1-default (64-bit)
Graphics Platform: X11
Processors: 8 × AMD Ryzen 7 4700U with Radeon Graphics
Memory: 15.0 GiB of RAM
Graphics Processor: AMD RENOIR

ADDITIONAL INFORMATION
Information for package elisa:
------------------------------
Repository     : unstable-kde-applications
Name           : elisa
Version        : 21.11.70git.20210916T140307~578a8878-ku.12.13
Arch           : x86_64
Vendor         : obs://build.opensuse.org/KDE:Unstable
Installed Size : 2.7 MiB
Installed      : Yes
Status         : out-of-date (version 21.11.70git.20210916T140307~578a8878-ku.12.12 installed)
Source package : elisa-21.11.70git.20210916T140307~578a8878-ku.12.13.src
Summary        : Music player and collection organizer
Description    : 
    Elisa is a music player with a library where music can be browsed by
    album, artist or all tracks. It is indexed using either a private
    indexer or an indexer using Baloo. The private one can be configured
    to scan music on chosen paths. The Baloo one is faster because Baloo
    is providing all needed data from its own database. Playlists can be
    built and played.