The items selected by dragging on the desktop are not visually highlighted after the KDE Plasma 6 update

Help
1

One problem I’m encountering is that the “Application Bar” fails to display open applications. Additionally, when I attempt to select items by dragging them on the desktop, there’s no visual indication of the selection.
image

As depicted in the image, although Firefox is currently open, it doesn’t appear on the application bar.

Another issue I’m experiencing is that Telegram Desktop automatically mutes itself whenever I open any video. Consequently, I have to manually unmute it each time to watch videos with sound.

My system configuration is as follows:

Operating System: Arch Linux
Desktop Environment: KDE Plasma 6.0.1
Graphics card: AMD Radeon RX 6650 XT

I have tried to reset theme settings and stuff, but still doesn’t work.

2

I managed to fix it by removing all Plasma-related packages and clearing all Plasma-related files from the home folder and other filesystem paths. I am not completely sure what exactly fixed it.