Using Logitech Companion (BT) ignores Kodi’s keymap on letters

I have mapped certain buttons on my Logitech Companion (with Hub) to certain letters to use with Kodi. But when I press the buttons, rather than do what I intend, it will act as if I’m browsing with initials.

Pressing DVR, which I’ve set to W in Logitech’s software, should mark a show/movie/episode as watched. But it just skips down to first title starting with W. Same with C and I, and other keys I’ve mapped in ~/keymaps/gen.xml.

Buttons I’ve remapped to F1, F2 and so on works as intended.

The Hub is connected to the PC with Bluetooth.

What am I doing wrong?