Date is not set when importing track as singleton

[tremby]

A file was not importing as I expected it to. To reduce the problem, I cleared all metadata on the file, and now I'm trying to import it as a singleton. I am giving the Musicbrainz ID when prompted to (https://musicbrainz.org/recording/dba51fac-736b-4d3f-8178-a8f302b9ce45). The track has a year/month/day associated in Musicbrainz so I expect beets to tag that into the file, but it is not getting set in the beets library or in the file's tags.

Starting from a flac file, I wipe its metadata (I wouldn't normally; this is for clean-room conditions):

$ metaflac --remove-all-tags I,\ the\ Organic\ Machine.flac

Then I import it:

$ beet -vv --plugins= imp -s -t --from-scratch I,\ the\ Organic\ Machine.flac

Giving this output:

user configuration: /home/me/.config/beets/config.yaml
data directory: /home/me/.config/beets
plugin paths:
Sending event: pluginload
library database: /home/me/.config/beets/library.db
library directory: /home/me/media/audio/music
Sending event: library_opened
Sending event: import_begin
Sending event: import_task_created
Sending event: import_task_start
Looking up: /path/to/I, the Organic Machine.flac
Item search terms:  -
Found 0 candidates.

/path/to/I, the Organic Machine.flac
Sending event: before_choose_candidate
No matching recordings found.
➜ [S]kip, Use as-is, Enter search, enter Id, aBort? i
Enter recording ID: dba51fac-736b-4d3f-8178-a8f302b9ce45
Searching for track ID: dba51fac-736b-4d3f-8178-a8f302b9ce45
Sending event: mb_track_extract
Sending event: trackinfo_received
Sending event: before_choose_candidate

  Match (40.0%):
  Cloudkicker - I, the Organic Machine
  ≠ title
  MusicBrainz, Index None, Track None,
  https://musicbrainz.org/recording/dba51fac-736b-4d3f-8178-a8f302b9ce45
  ≠ Artist:  -> Cloudkicker
➜ Apply, More candidates, Skip, Use as-is, Enter search, enter Id, aBort? a
Sending event: import_task_choice
Sending event: import_task_apply
0 of 1 items replaced
Sending event: database_change
Sending event: database_change
Parsed query: AndQuery([NoneQuery('album_id', True)])
Parsed sort: NullSort()
Sending event: item_copied
Sending event: database_change
Sending event: write
Sending event: after_write
Sending event: database_change
Sending event: import_task_files
Sending event: item_imported
Sending event: import
Sending event: cli_exit

After importing, beets and a look at the actual metadata with metaflac tell me the date has been written as 0000, and year 0.

$ metaflac --list --block-type=VORBIS_COMMENT /home/me/media/audio/music/Cloudkicker/non-album/*I,\ the\ Organic\ Machine.flac | egrep -i "date|year|month|day"
    comment[28]: DATE=0000
    comment[29]: YEAR=0
    comment[53]: ORIGINALDATE=0000
$ beet ls -f 'album:$album   title:$title   track:$track   year:$year month:$month day:$day' "i, the organic"
album:   title:I, the Organic Machine   track:00   year:0000 month:00 day:00

Setup

• OS: Ubuntu 22.04
• Python version: 3.10.12
• beets version: 2.3.1
• Turning off plugins made problem go away (yes/no): no

My configuration (output of beet config) is:

# --------------- Plugins ---------------

plugins: fetchart replaygain inline scrub mpdupdate convert mbsync

# --------------- Tagging ---------------

per_disc_numbering: yes
va_name: various artists

import:
    languages: en
    from_scratch: yes
musicbrainz:
    genres: yes
item_fields:
    multidisc: 1 if disctotal > 1 else 0
paths:
    default: $albumartist_sort/%if{$year,$year -- }$album%aunique{}/%if{$multidisc,$disc-}$track $title
    singleton: $artist_sort/non-album/%if{$year,$year -- }$title
    comp: compilations/%if{$year,$year -- }$album%aunique{}/%if{$multidisc,$disc-}$track $title
fetchart:
    cautious: yes
    auto: yes
    minwidth: 0
    maxwidth: 0
    quality: 0
    max_filesize: 0
    enforce_ratio: no
    cover_names:
    - cover
    - front
    - art
    - album
    - folder
    sources:
    - filesystem
    - coverart
    - itunes
    - amazon
    - albumart
    - cover_art_url
    store_source: no
    high_resolution: no
    deinterlace: no
    cover_format:
    google_key: REDACTED
    google_engine: REDACTED
    fanarttv_key: REDACTED
    lastfm_key: REDACTED
replaygain:
    backend: ffmpeg
    r128_targetlevel: 84
    per_disc: yes
    overwrite: no
    auto: yes
    threads: 2
    parallel_on_import: no
    peak: 'true'
    targetlevel: 89
    r128: [Opus]
convert:
    dest: ~/media/audio/music.opus
    never_convert_lossy_files: yes
    format: opus
    album_art_maxwidth: 800
    embed: no
    pretend: no
    link: no
    hardlink: no
    threads: 2
    id3v23: inherit
    formats:
        aac:
            command: ffmpeg -i $source -y -vn -acodec aac -aq 1 $dest
            extension: m4a
        alac:
            command: ffmpeg -i $source -y -vn -acodec alac $dest
            extension: m4a
        flac: ffmpeg -i $source -y -vn -acodec flac $dest
        mp3: ffmpeg -i $source -y -vn -aq 2 $dest
        opus: ffmpeg -i $source -y -vn -acodec libopus -ab 96k $dest
        ogg: ffmpeg -i $source -y -vn -acodec libvorbis -aq 3 $dest
        wma: ffmpeg -i $source -y -vn -acodec wmav2 -vn $dest
    max_bitrate:
    auto: no
    auto_keep: no
    tmpdir:
    quiet: no
    paths: {}
    no_convert: ''
    copy_album_art: no
    delete_originals: no
    playlist:
mpd:
    host: localhost
    port: 6600
    password: REDACTED
scrub:
    auto: yes
pathfields: {}
album_fields: {}

Am I doing something wrong (do I need to configure it somehow to accept the date from MB?), or have I found a bug?