Display problems with Nvidia Surround

Hi, 

I'm running NFS Heat on a PC using Nvidia Surround on a GTX 1060 to display across 3 monitors at 5760x1080 resolution.

There are a lot of places in the game where the display is incorrect on the centre monitor - only the middle third of the monitor is displayed correctly, the left and right sections of the monitor are dark. The left and right monitors always display correctly. This happens:

1. At the loading screen and welcome screen:

2. During all cutscenes

3. On the map screen. The missing sections are there but too dark to see:

When driving around all 3 monitors are displayed correctly:

If I change the resolution to 1920x1080 so that only the centre monitor is used everything is displayed correctly.

Game was installed via Steam so has the latest updates and I'm using the latest available Nvidia drivers. 

Any ideas? I can still play the game but missing big chunks of the cutscenes is a shame and the map problem makes things especially tricky - the sections I can't see include all of the details about races!

Thanks,

Jason