So, I did some testing.
For the note: I play DCS 2.7 open beta and this is 7th mission in Serpent head 2 campaign.
If I laungh DCS and immediately start this mission, everything runs normal.
If I fly other mission (I used A2A refuel for example) before I run the night mission, I see this glowing.
If I restart DCS and launch the night mission first again, it runs normally again. This is consistent, I have checked couple of times.
Track files are 10MB, too big to attach.
If I change weather in ME, it removes the artifact, but I cannot save the changes in the mission file as it is commercial campaign.
So for now, the issue is kinda solved, may be it would be useful for future debugging.