So I don't think this is a new thing exactly, but I couldn't find a topic on it. Sometimes (usually in desert scrap) a ship entering cloud will vanish entirely, even if you are literally within spitting ditance, or ever clipping slightly during a ram. That's ridiculous. If you can see it through the particle effects (which are pretty realistic), you can see it. More recently I've seen ships popping in and out of existence when they were nowhere near any clouds, in a clear sky over Fernfeld. One second they're in weapons range, the next, they're invisible, even if you can still hit them.
I don't know if this is a rendering bug, or if it's a deliberate balance thing to overcome the smoke/chemspray thing making ships too visible through clouds. If that's the case, wouldn't it be better to just make those particle FX vanish when the ship enters cloud? Then the silhouette of the ship would still be visible to a keen eye, but the giveaway chemspray FX would not be glowing through the mist. It's pretty minor, but it is certainly annoying.