Hey Gurm, thanks for the update on what's happening with you - always interested to hear about your solutions. I've been using my 9560 very comfortably with ditherig enabled on an old version of Windows until recently. Then as I felt confident and wanted to update some features on my laptop I upgraded to the Fall Creator's Update but I think it may be causing me problems now. I feel pretty stupid, broke the first rule of finding a solution in this game - NEVER CHANGE IT WHEN IT WORKS!
So yeah, I'm going to try and live with it for a bit since for some reason the rollback option isn't working for me, but I may be looking at re-installing everything (AGAIN) and going back to an old version. Out of interest, could you kindly upload your LTSB 2015 version of Windows? I have been struggling to get a working download of it. Would be much appreciated.