Okay thanks. It would have to be a vanilla issue if that were the case. I’m pretty sure I know what was doing it.
It’s my own personal mod so I am using some FX from the Disco mod, specifically a particle FX that they attach to some tradelane rings in nebulas. It replaces the lights with a particle FX, so 16 of them per ring. I added them to the first and last ring in each lane, and also added 12 of them to planetary docking rings.
I think what was happening, and why it was crashing at planets, is that with sometimes 3 tradelanes and a docking ring in that area, it was adding up to 50 or so of these particle FX and the game just can’t cope with it.
I thought it was fine when I used it in the past, but perhaps I was wrong about that, could have been one of the last things I was playing around with before I stopped a couple of years back.