It seems to be happening with pretty much every window in LOD, Dragonsreach is just the easiest one to get a good view of. I've done the separate OCS generations multiple times to test with the same results.
OS: Windows 7 Professional x64
ENB: Vividian 7
Do farmhouse or imperial forts windows outside the cities do the same?
Is that with Windows 'high' checked or not? Try the opposite.
When using 'high', those LOD light windows are "decals" that never should z-fight like this. None of the Skyrim INI settings with "decal" seem to influence that - never seen similar reports. I am suspecting graphics driver or driver settings. It could have to do with any setting related to transparency or anti-aliasing, FXAA etc. Maybe something else that changes shaders.
If not using 'high', see if setting UseDecalFlag=1 in ..\DynDOLOD\Edit Scripts\DynDOLOD\DynDOLOD_TES5.ini and generating static LOD again makes a difference.
Edited by sheson, 06 June 2017 - 08:05 AM.