When KGlobal::newComponentData(...) sets the new mainComponent, this will not have any effect on the global iconloader. That one will always use the component which was the main/global one when the singleton was triggered to exist.
Call KIconLoader::reconfigure() when the component data changes. Since scanning the icon theme directories is a costly operation, the icon loader has to cache them.
Is that still an issue for the current KF6 implementation?
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This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone!