jellyfin: replay gain does not apply?

[nagisa]

I have a large library of music tagged with beets. A representative sample of ffprobe output for a track:

Input #0, flac, from '05 - Infected Mushroom - Suliman.flac':
  Metadata:
    playcount:[email protected]: 2
    labelid         : EQCD008
    ACOUSTID_FINGERPRINT: AQADtEkkLUqWREqC9zgJdyy0H-HgV7jYw0dL5sL5oTDsH_2RI9GJ4zpGxyu6Hdc-mMqFM8eP-iWO_3hI5NBFfBWuKT1eHVcWZcSJBpqOL4dy1A58hM3xqEuGH3x_lB-acSHyBTzu4zLxpoL8De6OXMV-uLiO82jaEX2GhzuOH3-EeovxAB8CvUL6GT9cf-iVHtfR4kJ_XFFwEWEfQcyRN0ooOBRxE_6RH-KPWkf4wLmOKmGGk0OeQjku6sh1PMF
    ACOUSTID_ID     : a0d1354e-185a-41d0-b013-440ab83c9916
    ALBUM           : Vicious Delicious
    ALBUM ARTIST    : Infected Mushroom
    album_artist    : Infected Mushroom
    ALBUMARTIST_CREDIT: Infected Mushroom
    ALBUMARTISTSORT : Infected Mushroom
    RELEASESTATUS   : Official
    MUSICBRAINZ_ALBUMSTATUS: Official
    RELEASETYPE     : album
    MUSICBRAINZ_ALBUMTYPE: album
    ARTIST          : Infected Mushroom
    ARTIST_CREDIT   : Infected Mushroom
    ARTISTSORT      : Infected Mushroom
    BPM             : 145
    CATALOGNUMBER   : EQCD008
    COMPILATION     : 0
    COMPOSER        : Erez Aizen, Amit Duvdevani
    COMPOSERSORT    : Aizen, Erez, Duvdevani, Amit
    RELEASECOUNTRY  : AU
    DATE            : 2007-03-26
    YEAR            : 2007
    disc            : 1
    DISCTOTAL       : 1
    DISCC           : 1
    TOTALDISCS      : 1
    GENRE           : Goa
    INITIALKEY      : Am
    ISRC            : BRRBU0900102;GBVVQ1029526;IL1080708110
    LABEL           : EQ Recordings
    PUBLISHER       : EQ Recordings
    LANGUAGE        : eng
    MUSICBRAINZ_ALBUMARTISTID: eab76c9f-ff91-4431-b6dd-3b976c598020
    MUSICBRAINZ_ALBUMID: 1a8cda2e-f8cd-3741-adee-6ad38515c2a1
    MUSICBRAINZ_ARTISTID: eab76c9f-ff91-4431-b6dd-3b976c598020
    MUSICBRAINZ_RELEASEGROUPID: 8091fa74-1c46-3a85-a0dc-d8c5ce052afc
    MUSICBRAINZ_RELEASETRACKID: cb311eba-51a5-3e25-a1a8-b87aa8f8d297
    MUSICBRAINZ_TRACKID: 45f9deff-0ca4-4f66-bc6c-35c3302100f7
    MUSICBRAINZ_WORKID: 0e1008fe-e4d8-4aa5-96cc-da99ae0a57ac
    MEDIA           : CD
    ORIGINALDATE    : 2007-03-20
    REPLAYGAIN_ALBUM_GAIN: -8.43 dB
    REPLAYGAIN_ALBUM_PEAK: 1.364583
    REPLAYGAIN_TRACK_GAIN: -8.30 dB
    REPLAYGAIN_TRACK_PEAK: 1.216186
    SCRIPT          : Latn
    TITLE           : Suliman
    track           : 5
    TRACKTOTAL      : 11
    TRACKC          : 11
    TOTALTRACKS     : 11
  Duration: 00:06:10.76, start: 0.000000, bitrate: 919 kb/s
  Stream #0:0: Audio: flac, 44100 Hz, stereo, s16
    Side data:
      replaygain: track gain - -8.300000, track peak - 0.000028, album gain - -8.430000, album peak - 0.000032, 

I have enabled replaygain functionality in tauon and imported my library.

When I play this track as a local file, the replaygain kicks in and the track is not too loud. However when played from jellyfin, it sounds as if replaygain is not being applied at all.

Is this the intended behaviour, did I perhaps miss something or is it simply not implemented yet?

Tauon Music Box v7.7.0, comes from nixos-unstable nixpkgs.