Hi all,
I disabled the Nvidia sound in Device manager, but it killed all WOFF sound.
However I had the monitor, WOFF and Nvidia resolutions set to 1920 x 1080. I reduced them all to the next resolution down, 1842 x 1036 and it works as it should – no more black screen at mission end.

From what I’ve read this problem can when using HD tv’s as the monitor (I use a 50” LG HD tv).

Hope this helps.

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Alienware Aurora R5
Windows 10 64 bit
Intel i7-6700K 4.2Ghz
Two GTX 1080 Foundations in SLI (8 Gig each)
32 Gig DDR4 2133Mhz
1TB SSD boot drive - 1TB SATA storage drive
5.1 Surround Sound
34" Dell Ultra Sharp U3415W (3440x 2440)
CH Pro-Pedals, Stick and Throttle
TrackIR-5 Pro