Indeed my assumption the leak was in plasma was wrong because @hugalafutro wasn’t correct in
Both use arch and kde 6.3.2 with just the default systray applets and icon only taskbar, no plasmoids, no widgets.
plugin=luisbocanegra.panel.colorizer
This one uses DBus Connection and is likely the leakage.
@hugalafutro try deactivating it, if this fixes your issue, you can report it to the plasmoid author at his github GitHub - luisbocanegra/plasma-panel-colorizer: Latte-Dock and WM status bar customization features for the default KDE Plasma panel