I did mod with custom skeleton and character which using infected simulation, but in 1.30 I see animation freeze when camera distance is more than 2 meters. In then past it was size of network bubble, in 1.29 was this distacne lowered due "optimizations" to around 200 meters, but now is 2 meters. Its interesting, that vanilla infecterd are animated without that issue.

What exactly changed in this regard? Why is animation stopped when camera/playerd distance is bigger than 2 meters?

It completely break mods using infected simulation.

Change notes of animation subsystem should be more detailed in my opinion.

spawn custom ai which using infected simulation

custom character is animated from longer distance