I worked a lot, fixing the bugs of more than 1k icons in KDE, during two months.
In spite of my project having been well-successful, I am facing the problem of icons rendering in KDE, there are more or less than 20 icons which are not well rendered in KDE.
I have spent 2 weeks researching how to solve that bug of icon rendering in KDE. I have seen it is one of the very known issues in the KDE world. I have made more than 50 attempts to fix the badly rendered icons and none of different versions of icons worked well in KDE.
I also used Figma to clean the codes, Inkscape to export the icons as plain and optimised SVG file, but none of them worked in KDE.
I can not find or discover the real problem or real cause in these icons.
The most of icons I developed for KDE, are Gravit Designer-based.
You can read and analyse from my comment until end:
Thank you for your attention and understanding!