Note: I've gotten a crash once after creating a flat world (couldn't reproduce it more than once) on 4.2.dev godotengine/godot@7831eedf1:
ERROR: Caller thread can't call this function in this node (/root). Use call_deferred() or call_thread_group() instead.
at: propagate_notification (./scene/main/node.cpp:2218)
Note: I've gotten a crash once after creating a flat world (couldn't reproduce it more than once) on 4.2.dev godotengine/godot@7831eedf1: