Object Reference error on Deleted group in Collection view

[Scrxtchy]

Directly related to my issue japanesemediamanager/jmmserver#430 Upon displaying a group under the affect of a deleted series, JMM Desktop would display an object reference issue. This is after pressing Delete Series from the group's options in the collection screen. The entire view is refreshed, but the series remains in the collection, which when prompted displays the error

[2016-09-22 15:59:31:367] Info|EpisodeList.PopulateToolbars => AnimeSeriesVM.get_EpisodeTypes => AnimeSeriesVM.RefreshEpisodes Got episode data from service: Fate/Zero in 0.4922 ms
[2016-09-22 15:59:31:400] Info|EpisodeList.PopulateToolbars => AnimeSeriesVM.get_EpisodeTypes => AnimeSeriesVM.RefreshEpisodes Got episode contracts: Fate/Zero in 27.5483 ms
[2016-09-22 15:59:31:400] Info|EpisodeList.PopulateToolbars => AnimeSeriesVM.get_EpisodeTypes => AnimeSeriesVM.RefreshEpisodes Sorted episode contracts: Fate/Zero in 0 ms
[2016-09-22 16:00:36:796] Error|RoutedEventArgs.InvokeHandler => MainWindow.lbGroupsSeries_SelectionChanged => Utils.ShowErrorMessage System.NullReferenceException: Object reference not set to an instance of an object.
   at JMMClient.AnimeSeriesVM.Populate(Contract_AnimeSeries contract) in D:\My Files\Documents\GitHub\jmmclient\JMMClient\ViewModel\AnimeSeriesVM.cs:line 785
   at JMMClient.AnimeSeriesVM.RefreshBase() in D:\My Files\Documents\GitHub\jmmclient\JMMClient\ViewModel\AnimeSeriesVM.cs:line 866
   at JMMClient.MainWindow.lbGroupsSeries_SelectionChanged(Object sender, SelectionChangedEventArgs e) in D:\My Files\Documents\GitHub\jmmclient\JMMClient\MainWindow.xaml.cs:line 3386
[2016-09-22 16:14:24:172] Trace|MainWindow.CheckForUpdatesNew => JMMAutoUpdatesHelper.GetLatestVersionInfo => Utils.DownloadWebPage DownloadWebPage: http://www.jmediamanager.org/latestdownloads/versions.xml
[2016-09-22 16:14:26:998] Trace|BackgroundWorker.OnDoWork => MainWindow.showDashboardWorker_DoWork => DashboardVM.RefreshData Dashboard Time: RefreshGroupsSeriesData: 2312.6029
[2016-09-22 16:14:29:182] Warn|UTorrentHelperVM.Init => UTorrentHelper.Init => UTorrentHelper.PopulateToken Credentials are not valid for uTorrent
[2016-09-22 16:14:34:961] Info|EpisodeList.PopulateToolbars => AnimeSeriesVM.get_EpisodeTypes => AnimeSeriesVM.RefreshEpisodes Got episode data from service: Fate/Stay Night in 3.5062 ms
[2016-09-22 16:14:34:996] Info|EpisodeList.PopulateToolbars => AnimeSeriesVM.get_EpisodeTypes => AnimeSeriesVM.RefreshEpisodes Got episode contracts: Fate/Stay Night in 30.0536 ms
[2016-09-22 16:14:34:996] Info|EpisodeList.PopulateToolbars => AnimeSeriesVM.get_EpisodeTypes => AnimeSeriesVM.RefreshEpisodes Sorted episode contracts: Fate/Stay Night in 0 ms
[2016-09-22 16:22:43:673] Error|RoutedEventArgs.InvokeHandler => MainWindow.lbGroupsSeries_SelectionChanged => Utils.ShowErrorMessage System.NullReferenceException: Object reference not set to an instance of an object.
   at JMMClient.AnimeSeriesVM.Populate(Contract_AnimeSeries contract) in D:\My Files\Documents\GitHub\jmmclient\JMMClient\ViewModel\AnimeSeriesVM.cs:line 785
   at JMMClient.AnimeSeriesVM.RefreshBase() in D:\My Files\Documents\GitHub\jmmclient\JMMClient\ViewModel\AnimeSeriesVM.cs:line 866
   at JMMClient.MainWindow.lbGroupsSeries_SelectionChanged(Object sender, SelectionChangedEventArgs e) in D:\My Files\Documents\GitHub\jmmclient\JMMClient\MainWindow.xaml.cs:line 3386
[2016-09-22 16:28:06:841] Trace|BackgroundWorker.OnDoWork => MainWindow.showDashboardWorker_DoWork => DashboardVM.RefreshData Dashboard Time: RefreshGroupsSeriesData: 9.5175

[ElementalCrisis]

I'm not having this issue on 3.7, will continue to investigate but it might have been fixed with changes made in 3.7.

[Scrxtchy]

Here's a pretty bad recording on what's happening my end, if it may help https://youtu.be/VxwocscPI5U

[ElementalCrisis]

Yeah seems like its been fixed in 3.7, we'll be having a public beta in a couple of days where you can try and if you can replicate we'll look into it.

[Scrxtchy]

Unable to replicate this in 3.7. If caught again, will reopen