Failed to instantiate scene state of "snake_body.tscn", node count is 0. Make sure the PackedScene resource is valid

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My hunch here is that instantiation fails when a “preload loop” is encountered.

For example:

  • Scene A preloads Scene B
  • Scene B preloads Scene C
  • Scene C preloads Scene A

In this case, instantiating Scene A from Scene C fails.

See also: cyclic error? - #3 by system