This was probably fallout from the switch to GTK3 and is unlikely the fault of KDE (that only configures the GTK theme and nothing more). Eclipse and GTK3 was s

This was probably fallout from the switch to GTK3 and is unlikely the fault of KDE (that only configures the GTK theme and nothing more). Eclipse and GTK3 was so broken (is it better now? I switched to IntelliJ) that almost everone recommended to set a flag to get back to GTK2. But I feel your pain, it's not new - there is a name for it: https://www.jwz.org/doc/cadt.html https://www.jwz.org/doc/cadt.html - it's still true :(