Load scene loads every object twice

[balloonpopper]

Bug description

If you step through the code after a "goto_room" call, the code will eventually get to this line in i_room.gd :

E.get_tree().change_scene_to_file(load(rp).scene)

If you step through that (F7 key) it will instantiate every item in your scene, one node at a time. What I've noticed though is that it instantiates twice as many nodes as you have in your scene.

Steps to reproduce

Steps to reproduce the behavior:

1. Create 2 simple rooms.
   a) Room 1 has a region or prop that runs an "R.goto_room()" command
   b) Room 2 has a walkable area and a prop for the background

2. Put a breakpoint on the line in i_room.gd (~line 194)
3. Run the game and step through (F7) that line. You will step through as the debugger instantiates room 2 twice, and the prop twice.

Expected vs observed behavior

Nodes should only instantiate once.

Environment information (please complete):

• Windows 10
• 4.4.dev3
• Latest develop commit of Popochiu

Additional context

This might be a bug in this version of Godot. Haven't tested that yet - wanted to capture the bug first.