C++ error on storing viewport node in variable

[Lalafella]

Godot version

3.5.stable

System information

Window 10

Issue description

When I store viewport node in a variable to use it later, it gave me a lot of [getornull: Condition "!id_map.has(p_rid.get_data())" is true. Returned: __null] which flooded my debugger stack. It is not gamebreaking but sure is pretty annoying one.

The fix is to do not store viewport node in variable and using get_node to call its function instead but it is not entirely fixed and can still happen sometimes.

Steps to reproduce

I ran this code in my SceneChanger which is in autoload.

func _ready():
yield(get_tree() , "idle_frame")

if get_tree().get_current_scene().has_node("map_viewport_container/map_viewport"):
	map_viewport = get_tree().get_current_scene().get_node("map_viewport_container/map_viewport")

if map_viewport and map_viewport.get_children().size() > 0 :
	for map in map_viewport.get_children():
		if map.is_in_group("Map_Scene"):
			current_map_scene = map
			break
battle_scene_container = get_tree().get_current_scene().get_node("battle_scene_container")

I remove map_viewport variable and replace them with get_tree().get_current_scene().get_node("map_viewport_container/map_viewport") instead and it is fixed but I still get the problem again sometimes.

Minimal reproduction project

No response

[Calinou]

This is likely a dangling reference: #41360

Please upload a minimal reproduction project to make this easier to troubleshoot.

[AThousandShips]

Closing due to lack of response, if you provide the requested information this can be reopened