Controller buttons in music player

I recently upgraded to Kodi 17.0 on an Ubuntu 16.04 system (17.1 is not yet in the PPA) Before starting Kodi 17 the first time I deleted my old .kodi profile, as I figured I might as well start afresh.

I have a Logitech F710 with buttons that match the Xbox360’s one for one. I have set it up in the new controller configurator (System settings | Input | Configure attached controllers) so that each button mirrors that of the template (X is X, Y is Y, left shoulder is left shoulder, etc.) No tweaks or changes of any kind.

The reason for the post is that I’m seeing what appears to be some really weird, default bindings in the Music player, specifically. The vide player works fine but the X and Y buttons do strange things in the Music player.

In the Video player, each button does more or less exactly the same as it did in 16.1: A toggle-pauses (space-like), B stops playback and goes back, Y toggles between player and file view (tab-like), X brings up player controls.

In the Music player, A and B do pretty much the same as in the video player: Pause-toggle and Go-Back respectively. X and Y, on the other hand…

* AFAICT pressing the X button takes me to the configuration screen of the latest plugin I have configured.
* Pressing Y opens an unnamed dialog screen that seems to be an empty item list where I can do nothing but press cancel.

Needless to say both are completely useless and out of context in the music player. I expected the X button to bring up player controls (something that I’m able to do by hitting M on the keyboard), and Y button to function as Tab. Is this a bug? Does it affect any other controllers?

I haven’t made any alterations to the keymapping and there is no joystick.xml in my userdata folder. I can probably fix it by hacking in such a file but I would prefer figuring out why/where the defaults are coming from and if anybody else is seeing it?