I have Godot 4.3 installed on two different PCs.
The same project! Project synced via Github.
Aaaand... one Godot editor now constantly trying to add these line into the scene.
And the other one removes the very same lines from the very same scene.

On both PCs the project runs same good! Absolutely the same! As if nothing changes at all.
So here I think that... probably there is some option in the Godot? That I could accidentally set on one PC only?.. No other ideas!
Any guesses, any hints, please? It is not that my work is ruined, it is just annoying and I do not understand what's wrong.
Here's the scene in question as it is now, as on Git screenshot above:

[gd_scene load_steps=10 format=3 uid="uid://csoum678mcwos"]
[ext_resource type="Script" path="res://scripts/base_unit.gd" id="1_g4vca"]
[ext_resource type="PackedScene" uid="uid://14e3aouiim62" path="res://scenes/components/selection_component.tscn" id="2_vnryf"]
[ext_resource type="PackedScene" uid="uid://trb2btu6gkv2" path="res://scenes/components/movement_component.tscn" id="4_papcb"]
[ext_resource type="Script" path="res://scripts/ability/ability.gd" id="4_xh141"]
[ext_resource type="Script" path="res://scripts/ability/ready_state.gd" id="5_173ct"]
[ext_resource type="Script" path="res://scripts/ability/action_build_unit.gd" id="6_2gs7b"]
[ext_resource type="Script" path="res://scripts/ability/cooldown_state.gd" id="7_olgk0"]
[sub_resource type="RectangleShape2D" id="RectangleShape2D_ah5iw"]
size = Vector2(26, 27)
[sub_resource type="LabelSettings" id="LabelSettings_r15cn"]
font_size = 12
font_color = Color(0, 0, 0, 1)
[node name="BaseUnit" type="CharacterBody2D"]
collision_layer = 2
motion_mode = 1
platform_on_leave = 2
platform_floor_layers = 4294901760
platform_wall_layers = 65535
script = ExtResource("1_g4vca")
[node name="Line2D" type="Line2D" parent="."]
points = PackedVector2Array(-128, -128, 128, -128, 128, 128, -128, 128)
closed = true
width = 1.0
default_color = Color(1, 0.46, 0.46, 0.498039)
joint_mode = 1
[node name="UnitCollision" type="CollisionShape2D" parent="."]
position = Vector2(0, 3.5)
shape = SubResource("RectangleShape2D_ah5iw")
[node name="SelectionComponent" parent="." instance=ExtResource("2_vnryf")]
[node name="MovementComponent" parent="." instance=ExtResource("4_papcb")]
[node name="UnitShape" type="Polygon2D" parent="."]
color = Color(0.86, 0.4128, 0.4128, 1)
polygon = PackedVector2Array(-16, -22, 16, -22, 16, 17, -16, 17)
[node name="Label" type="Label" parent="."]
offset_left = -17.0
offset_top = 2.0
offset_right = 15.0
offset_bottom = 24.0
text = "Unit"
label_settings = SubResource("LabelSettings_r15cn")
horizontal_alignment = 1
[node name="AbilityProgress" type="ProgressBar" parent="."]
visible = false
offset_left = -16.0
offset_top = -29.0
offset_right = 16.0
offset_bottom = -24.0
step = 1.0
show_percentage = false
[node name="Ability" type="Node" parent="." node_paths=PackedStringArray("initialState")]
script = ExtResource("4_xh141")
reload = 1.0
inputName = &"S_key"
initialState = NodePath("ready_state")
[node name="ready_state" type="Node" parent="Ability" node_paths=PackedStringArray("nextState")]
script = ExtResource("5_173ct")
nextState = NodePath("../action_state")
[node name="action_state" type="Node" parent="Ability" node_paths=PackedStringArray("nextState")]
script = ExtResource("6_2gs7b")
buildTime = 1.0
cost0 = 1.0
nextState = NodePath("../cooldown_state")
[node name="cooldown_state" type="Node" parent="Ability" node_paths=PackedStringArray("nextState")]
script = ExtResource("7_olgk0")
nextState = NodePath("../ready_state")