Hi, I've been using KDE for a while now and I found it to be a very pleasant experience. Unfortunately, I've run into a problem with the widgets. The widgets that I've deleted reappear on startup. Not just the desktop ones, but the panel ones as well.

I am using Manjaro KDE.

Thank you!

Which exact Plasma version?
Do you save the session on logout?
Which panel?

Here's my sys info that I got from the info app:
Operating System: Manjaro Linux
KDE Plasma Version: 5.18.4
KDE Frameworks Version: 5.69.0
Qt Version: 5.14.2
Kernel Version: 5.4.33-1-MANJARO
OS Type: 64-bit
Processors: 4 × AMD A8-6410 APU with AMD Radeon R5 Graphics
Memory: 3.3 GiB of RAM

I have it configured to save the session on logout, but I know it's saving the layout because when I add new widgets they stay on login.
I have a custom panel that I've configured to be like the macOS top bar.

Thank you for the speedy response!

Edit: Correction, I have it configured to not save the session.

Sweet! I found the solution. I was force shutting my laptop down instead of shutting it down via software. I guess it didn't get to save the layout.

Apologies for wasting your time, Mamarok. Thank you!

I had the same problem and fixed by going to /home/yourname/.config/plasma-org.kde.plasma.desktop-appletsrc and here you have all your desktop applets .
Ex .remove
[Containments][1][Applets][33]

Thanks Marvi for the hint. That helped me as well.

This is https://bugs.kde.org/show_bug.cgi?id=417114, which will be fixed in the next KDE Frameworks release