Errors when restarting any scenario on the "Tutorials" track

[Jomosoto]

Summary

When restarting any scenario on the "Tutorials" track you get some errors and at some point the train stops.

How to reproduce

Steps to reproduce the behavior:

1. Start any scenario on the "Tutorial" track
2. Restart the scenario from the pause menu
3. Observe the errors

Observed behavior

When restarting any scenario on the "Tutorials" Track you get the following errors:

ERROR: Attempted get on a deleted object.
   at: get_named (core/variant_op.cpp:1693)
ERROR: Attempted method check on a deleted object.
   at: has_method (core/variant_call.cpp:1434)
SCRIPT ERROR: Invalid get index 'switch_part' (on base: 'previously freed instance').

And this one multiple times:

ERROR: Attempted get on a deleted object.
   at: get_named (core/variant_op.cpp:1693)
ERROR: Attempted method check on a deleted object.
   at: has_method (core/variant_call.cpp:1434)
SCRIPT ERROR: Invalid get index 'attached_signals' (on base: 'previously freed instance').
          at: LTSPlayer._bake_signals (res://Data/Scripts/Player.gdc:1680)

And then repeatedly:

SCRIPT ERROR: Invalid get index 'City1' (on base: 'Dictionary').
          at: LTSPlayer.get_distance_to_signal (res://Data/Scripts/Player.gdc:1118)
SCRIPT ERROR: Invalid operands 'Nil' and 'int' in operator '+'.
          at: LTSPlayer.updateNextStation (res://Data/Scripts/Player.gdc:1315)

At some point near the second station the train stops and this error is printed:

SCRIPT ERROR: Invalid get index 'name' (on base: 'previously freed instance').
          at: advanced (res://Worlds/Tutorials/TutorialScript.gdc:132)
ERROR: Condition "_first != nullptr" is true.
   at: ~List (./core/self_list.h:108)
ERROR: Condition "_first != nullptr" is true.
   at: ~List (./core/self_list.h:108)

Version

• Game Version: master branch (at f004eb6)
• OS: Artix Linux x86_64