OSC doesn't allow to go from the last track to the first (and vice versa) with --loop=inf

[Coacher]

Hello.

mpv version and platform

mpv-git @ 2493d91. OS Gentoo amd64.

Reproduction steps

Let file.m3u be a playlist with not less than 3 files.

1. mpv --no-config --loop=inf file.m3u
2. Make OSC show up and notice pl prev button is greyed out and doesn't work.
3. Switch to the last track in playlist.
4. Make OSC show up and notice pl next button is greyed out and doesn't work.

Expected behavior

OSC allows to go from the last track to the first (and vice versa) with --loop=inf, i.e. mentioned buttons aren't greyed out and working.

Actual behavior

OSC doesn't allow to go from the last track to the first (and vice versa) with --loop=inf.

Additional info

Keyboard shortcuts >, < work as expected.

Please fix.

[Coacher]

Thank you!