I had a very simialr bug. In a black hole System. While the "Star" was being scanned.This could either be the case of the visual mods (Immersive Galaxy, the bug Fix one specifically) Im using, though I havent seen it before 2.3, or a base game bug. It is caused by the science ship scanning the anomaly, as no other black holes showed this effect. It looks really cool IMO.
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But if I zoomed out it would flicker and then go out permanently.


And I run the base game almost exclusively.