2 回目以降の CurrentTrackChanged 発行で CurrentTrackInfo=null 発生→アプリ強制終了する時がある

[Asteriskx]

• SpotifyService.cs trackInfo = null で callback される周期がある？

      public async Task Start()
      {
          // Get song information and subscribe with Rx.
          // Do not release duplicate information to the stream.
          Observable.Interval(TimeSpan.FromSeconds(1))
              .Select(async _ => _CurrentlyPlaying = await _spotifyClient?.Player?.GetCurrentlyPlaying(new()))
              .Where(_ => _CurrentlyPlaying.IsPlaying)
              .Select(_ => CurrentTrackInfo.GetCurrentTrackInfo(_CurrentlyPlaying))
              .DistinctUntilChanged()
              .Subscribe(track => CurrentTrackChanged?.Invoke(track));
      }

[Asteriskx]

Observable.Interval の周期くさいが、根本原因はまだ不明。

[Asteriskx]

Observable.Interval(TimeSpan.FromSeconds(2)) で安定した。