If "add_child" generates nodes quickly, after the first successful synchronization of attributes using "Multiplayer Synchronizer", the attributes will become empty after a while

Godot Version

v4.2.1-stable_win64

Question

If “add_child” generates nodes quickly, after the first successful synchronization of attributes using “Multiplayer Synchronizer”, the attributes will become empty after a while. Why is this? I have been unable to find the reason.