I've also been having these same crashes. I've done new clean installs of Launchbox to no avail. Windows 11 with a RTX 5060 and no special themes or plugins. Any media I've imported is from the Launchbox Database or EmuMovies integration. Looking at the event viewer it seems like it could be that BigBox is trying to close/swap a video during attract mode cycling and the FFME video player crashes while disposing the old video.
at Unosquare.FFME.Container.MediaComponent.CloseComponent()
at Unosquare.FFME.Container.VideoComponent.Dispose()
at Unosquare.FFME.Commands.CommandManager.CommandCloseMedia()
The thing that's been odd to me is that these crashes happen but there are no error windows and I have to go into Windows Event Viewer to see these logs.