Airsonic: Last.FM scrobble broken because of bad timestamp

The last.fm scrobble feature on Airsonic has been broken for me since recently. I have the TZ environment variable configured as per documentation. I get the following in my logs while trying to scrobble:

2019-04-09 15:38:39.471  WARN --- o.a.p.s.AudioScrobblerService            : Failed to scrobble song 'King Of My Heart' at Last.fm. Bad timestamp, please check local clock.
2019-04-09 15:38:39.924  WARN --- o.a.p.s.AudioScrobblerService            : Failed to scrobble song 'Call It What You Want' at Last.fm. Bad timestamp, please check local clock.
2019-04-09 15:42:02.767  WARN --- o.a.p.s.AudioScrobblerService            : Failed to scrobble song 'Call It What You Want' at Last.fm. Bad timestamp, please check local clock.
2019-04-09 15:42:03.238  WARN --- o.a.p.s.AudioScrobblerService            : Failed to scrobble song 'I Did Something Bad' at Last.fm. Bad timestamp, please check local clock.
2019-04-09 15:46:01.047  WARN --- o.a.p.s.AudioScrobblerService            : Failed to scrobble song 'I Did Something Bad' at Last.fm. Bad timestamp, please check local clock.
2019-04-09 15:50:32.373  WARN --- o.a.p.s.AudioScrobblerService            : Failed to scrobble song 'Dark Saturday' at Last.fm. Bad timestamp, please check local clock.
2019-04-10 03:18:50.350  WARN --- o.a.p.s.AudioScrobblerService            : Failed to scrobble song 'Journeyman' at Last.fm. Bad timestamp, please check local clock.
2019-04-10 03:18:50.805  WARN --- o.a.p.s.AudioScrobblerService            : Failed to scrobble song 'Journeyman' at Last.fm. Bad timestamp, please check local clock.
2019-04-10 03:25:29.127  WARN --- o.a.p.s.AudioScrobblerService            : Failed to scrobble song 'Piece of Paper' at Last.fm. Bad timestamp, please check local clock.
2019-04-10 03:25:29.580  WARN --- o.a.p.s.AudioScrobblerService            : Failed to scrobble song 'Piece of Paper' at Last.fm. Bad timestamp, please check local clock.

The timezone and time is correctly set both within the container and on the host:

date && docker exec airsonic date
Wed Apr 10 03:29:19 IST 2019
Wed Apr 10 03:29:20 IST 2019

My entire configuration is available at https://github.com/captn3m0/nebula/blob/master/media/airsonic.tf if it helps.