Playlist OSD spans beyond screen with font sizes <30

Important Information

Provide following Information:

• mpv version - 0.35.1-dirty
• Platform and Version - Arch Linux 2023-05-13; Xfce 4.18
• Source of the mpv binary - official Arch Linux repos

If you're not using git master or the latest release, update.
Releases are listed here: https://github.com/mpv-player/mpv/releases

Reproduction steps

• Play a lot of files or a long playlist such that there are more entries than the F8 "Show Playlist" OSD can fit on the screen at once.
• Set an OSD font size <30 (i didn't test every applicable value so this constraint might not be exhaustive)
• The issue is reproducible even if no entry is long enough to span multiple lines

mpv --no-config --osd-font-size=29 <directory or playlist file/URL>

Expected behavior

The F8 "Show Playlist" OSD only ever displays as many entries as can fit on the screen. The whole OSD is visible and nothing is cropped off-screen.

Actual behavior

With font sizes >=30 mpv behaves as expected. The last line is visible and shows the amount of playlist entries that don't fit on screen.
With font sizes <30 mpv tries to display more entries at a time as can fit on the screen. Trailing lines are off-screen and not visible.

Log file

mpv-issue-11684-log_fontsize-playlist-mismatch.txt

Sample files

N/A

Start by reproducing the issue with mpv --no-config --osd-font-size=29 and a long playlist, then inspect mpv-issue-11684-log_fontsize-playlist-mismatch.txt. Compare the F8 playlist OSD behavior below and at font size 30; done means no playlist entries are rendered off-screen and the overflow count remains visible.