SUMMARY With the update to Plasma 5.26, a new widget style was introduced so that the widget shows the title and the album art, at least when it is placed directly on the panel. This is, however, entirely unwanted. STEPS TO REPRODUCE 1. Place the widget directly on the panel OBSERVED RESULT Album art and title are shown. EXPECTED RESULT The widget stays unchanged and keeps the same behaviour as in previous Plasma versions. SOFTWARE/OS VERSIONS Linux: KDE neon KDE Plasma Version: 5.26.0 KDE Frameworks Version: 5.98.0 Qt Version: 5.15.6 ADDITIONAL INFORMATION
Something I haven't mentioned in the original message is that the ideal scenario would be to have an option to toggle between the two versions.
*** This bug has been marked as a duplicate of bug 459714 ***