Yes, there was controversy around the Navier-Stokes result. But here are >300 problems and no corresponding >300 complaints of theft. Things are indeed moving really fast, and it's hard to keep up even as someone folrowing this with more obsession than would be healthy. Maybe somebody should keep a running short summary of The Situation...

Yes it was:

https://cepr.net/publications/ai-didnt-steal-the-mathematici...

Frontier theft is just faster.