VLC playback errors out under specified conditions

Ok, Jason. I'm sure you're well aware of this one as I've been poking at it for more than a couple weeks and I think I've got enough to collate into a full(er) report. I looked for an equivalent report, but didn't find it. I'll add all my supporting information here.

Behavior description:

Video playback in BB triggers a "could not find" error only after entering and exiting an emulator.

Version:

6 beta 13, through 6.2

Original error text:

System.IO.FileNotFoundException: Not found: Videos\Super Nintendo (SNES)\Ultima VI - The False Prophet (USA).mp4
File name: 'Videos\Super Nintendo (SNES)\Ultima VI - The False Prophet (USA).mp4'
at Meta.Vlc.Wpf.VlcPlayer.LoadMedia(String path)
at (<>c__DisplayClass4_0 )
at BigBox.Views.ImageVideoView.<>c__DisplayClass4_0.<PlayVlcVideo>b__0()
at System.Windows.Threading.DispatcherOperation.InvokeDelegateCore()
at System.Windows.Threading.DispatcherOperation.InvokeImpl()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Windows.Threading.DispatcherOperation.Wait(TimeSpan timeout)
at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherOperation operation, CancellationToken cancellationToken, TimeSpan timeout)
at System.Windows.Threading.Dispatcher.Invoke(Action callback, DispatcherPriority priority, CancellationToken cancellationToken, TimeSpan timeout)
at System.Windows.Threading.Dispatcher.Invoke(Action callback)
at BigBox.Views.ImageVideoView.PlayVlcVideo(String filePath, ChildViewModelBase parentViewModel)
at (ImageVideoViewModel , Object )
at BigBox.ViewModels.ImageVideoViewModel.set_VideoPath(Object value)
at (ImageVideoViewModel , String , String , Transition , ChildViewModelBase )
at BigBox.ViewModels.ImageVideoViewModel.Init(String imagePath, String videoPath, Transition transition, ChildViewModelBase parentViewModel)
at (GamesViewModelBase )
at BigBox.ViewModels.GamesViewModelBase.<selectionChangedTimer_Elapsed>b__99_0()
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()

Current handling text:

Video could not be played. It may be corrupt or incompatible with VLC

Not found: Videos\Super Nintendo (SNES)\Ultima VI - The False Prophet (USA).mp4

Conditions:

Playback set to VLC
Video manually associated with game in edit menu, not during import (this appears to be key; all other videos automatically associated with the entry play correctly all the time)
Any emulator entered then exited
Error triggered only in BigBox mode
In Launchbox mode, grey window instead of error. Clicking on different platform then back causes playback to work again.

Further details:

Error does not occur when playback set to WMP
Error will persist when playback set back to VLC
Error will not persist after exiting and entering the frontend
To replicate the error after rebooting the frontend, enter and exit an emulator as above.
Game file and video are set to Hyperspin database nomenclature
Launchbox install directory and rom/data directories are in D:\Games\Emulators\

System information:

Windows 10, updated and current
Kodi 16.1 used to launch BB, but testing has been done with Kodi not running
Several memory resident programs running including: AnyDVDHD, Controller Companion, Keepass 2.x
nVidia 660gtx gpu, driver updated and current
VLC installed separately, updated and current

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