"Kovarex enrichment process is now unlocked by automation, logistic and chemical science pack only."

This does not seem to be reflected on the research's page , and it still requires production science in the current version of the game. I assume this ether means:
A) It was silently reverted in a ...

I can't pinpoint an exact cause but I've usually had this happen when opening an ingame UI (like the Factoriopedia) or a couple times when launching the game.
When this happens, the game seemingly minimizes itself, but doesn't actually crash. Steam still shows that the game is running, and no crash ...