Hi,
I'm on Vulcanus, and I remote-drove my tank on Nauvis over to a biter nest at the edge of radar range, and surprisingly the biters were frozen. After attacking, they responded normally, attacking my tank; but when I retreated, the new biters that respawned were also frozen.
I loaded the save ...

The core method (of using fork() to get a separate process with the same memory map and then doing the save in that process) is pretty risky. You need to make sure that no locks are held by any thread other than the one calling fork() at the time of the fork. This include locks buried in library ...