Hello. Few updates ago midnight commander refuse to use standard keybord keys like arrow, page up/down a others. I had to remap them under menu settings. I tried it under clear installation and last update with same result (Kernel: 4.15.7-1 x86_64 bits: 64 compiler: gcc v: 7.3.0 Desktop: KDE Plasma 5.12.4 tk: Qt 5.10.1 Distro: KaOS (2018)).
mc arrow keys and other keybord keys default assigment