SUMMARY
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I have added the following Widgets :

1.Individual core Usage
2. Disk Usage

Modify the values to look how I needed them

Logout or reset PC -- all the custom values have gone and replaced with the initial values
 

STEPS TO REPRODUCE
1. Add these 2 widgets- individual core usage and disk usage
2. modify some values , BARS etc
3. restart or logout your pc - widgets will be reset to the default values 

OBSERVED RESULT


EXPECTED RESULT


SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: ArcoLinux Arch/5.25
(available in About System)
KDE Plasma Version:  5.25.3
KDE Frameworks Version:5.96 
Qt Version: 

ADDITIONAL INFORMATION
I have created another user - the same issue
I have used Wayland as well the same issue