Some system tray icons are blank

I have sys-net’s network icon and sys-usb’s blueman icon completely blank in system tray.

Are there any updates since 2016’s opened issue?

I use fedora as default template and KDE.

If the Issue discussion has no new information about it, then most likely there is no news. The developers have too few resources and too many bugs to fix, so any help would be appreciated.

Trying to understand what are my alternatives here.
Search gives just bunch of unresolved issues regarding the subject, plus no adequate alternatives.

I can help with identifying/reporting the issues, if it’s going to be addressed.
That networking icon alone is giving a one huge bubble of bugs.