ogg files become corrupted/unplayable

i'm using a build of the `master` branch of mixxx built with `faad=1` on ubuntu 19.04

here's an example of a before file:
https://igor.moomers.org/public/linger-before.ogg
here is the output of `ogginfo` on that file:

Processing file "the cranberries/the cranberries - linger.ogg"...

New logical stream (#1, serial: 00006612): type vorbis
Vorbis headers parsed for stream 1, information follows...
Version: 0
Vendor: Xiph.Org libVorbis I 20050304 (1.1.1)
Channels: 2
Rate: 44100

Nominal bitrate: 128.000000 kb/s
Upper bitrate not set
Lower bitrate not set
User comments section follows...
 ACOUSTID_FINGERPRINT=
 ACOUSTID_ID=
 ALBUM=Everybody Else Is Doing It, So Why Can`t We
 ALBUM ARTIST=The Cranberries
 ALBUMARTIST=The Cranberries
 ALBUMARTIST_CREDIT=
 ALBUMARTISTSORT=
 MUSICBRAINZ_ALBUMCOMMENT=
 MUSICBRAINZ_ALBUMSTATUS=
 MUSICBRAINZ_ALBUMTYPE=
 ARTIST=The Cranberries
 ARTIST_CREDIT=
 ARTISTSORT=
 ASIN=
 BPM=0
 CATALOGNUMBER=
 DESCRIPTION=
 COMMENT=
 COMPILATION=0
 COMPOSER=
 RELEASECOUNTRY=
 DATE=0000
 YEAR=0
 DISC=0
 DISCNUMBER=0
 DISCSUBTITLE=
 DISCTOTAL=0
 DISCC=0
 TOTALDISCS=0
 ENCODEDBY=
 ENCODER=
 GENRE=
 GROUPING=
 LABEL=
 PUBLISHER=
 LANGUAGE=
 LYRICS=
 MUSICBRAINZ_ALBUMARTISTID=
 MUSICBRAINZ_ALBUMID=
 MUSICBRAINZ_ARTISTID=
 MUSICBRAINZ_RELEASEGROUPID=
 MUSICBRAINZ_TRACKID=
 MEDIA=
 ORIGINALDATE=0000
 SCRIPT=
 TITLE=Linger
 TRACK=0
 TRACKNUMBER=0
 TRACKTOTAL=0
 TRACKC=0
 TOTALTRACKS=0
Vorbis stream 1:
 Total data length: 4430771 bytes
 Playback length: 4m:34.809s
 Average bitrate: 128.984635 kb/s
Logical stream 1 ended

i open mixxx -- note that "track metadata synchronization" is enabled.
i then load the file onto a deck.
i then press play. i let it play long enough that the `played` counter increments
i then stop the track and exit mixxx

the resulting file is here:
https://igor.moomers.org/public/linger-after.ogg
the output of ogginfo on the updated file:
WARNING: Could not decode Vorbis header packet 1 - invalid Vorbis stream (1)
WARNING: Could not decode Vorbis header packet 1 - invalid Vorbis stream (1)
Vorbis stream 1:
 Total data length: 0 bytes
 Playback length: 0m:00.000s
 Average bitrate: -nan kb/s
Logical stream 1 ended

re-opening mixxx and trying to play the file again says "the file could not be loaded", with the following log output:
Warning [CachingReaderWorker 1]: SoundSourceOggVorbis - Failed to initialize decoder for "file:///home/igor47/Music/music/the cranberries/the cranberries - linger.ogg"
Warning [CachingReaderWorker 1]: SoundSourceProxy - Unable to open file "file:///home/igor47/Music/music/the cranberries/the cranberries - linger.ogg" with provider "Xiph.org OggVorbis" using mode Strict
Warning [CachingReaderWorker 1]: SoundSourceSndFile - Error opening libsndfile file: "file:///home/igor47/Music/music/the cranberries/the cranberries - linger.ogg" "Supported file format but file is malformed."
Warning [CachingReaderWorker 1]: SoundSourceProxy - Unable to open file "file:///home/igor47/Music/music/the cranberries/the cranberries - linger.ogg" with provider "libsndfile" using mode Strict
Warning [CachingReaderWorker 1]: SoundSourceOggVorbis - Failed to initialize decoder for "file:///home/igor47/Music/music/the cranberries/the cranberries - linger.ogg"
Warning [CachingReaderWorker 1]: SoundSourceProxy - Failed to open file "file:///home/igor47/Music/music/the cranberries/the cranberries - linger.ogg" with provider "Xiph.org OggVorbis"
Warning [CachingReaderWorker 1]: CachingReaderWorker - Failed to open file: "/home/igor47/Music/music/the cranberries/the cranberries - linger.ogg"

this doesn't seem to happen with *all* ogg files, but a good number of them.

as a workaround, disabling metadata synchronization works well.

i'm glad i had backups of my ogg files, i haven't found a way to fix them once they're corrupted.