Comment 31 for bug 1869280

@yarloslav as you're compiling and can reproduce it, could you reapply that diff and change

    connect(filter, &LanguageChangeEventFilter::languageChangeEvent, this, &KirigamiPlugin::languageChangeEvent);

to

    connect(filter, &LanguageChangeEventFilter::languageChangeEvent, this, &KirigamiPlugin::languageChangeEvent, Qt::QueuedConnection);