### Godot version

4.0.dev (c309de53997feff3286295fb2d71657f112a15db)

### System information

Linux, Nvidia, Vulkan

### Issue description

Editor segfaults when certain conditions are met when using the AnimationPlayer editor.

### Steps to reproduce

1. Create multiple animations, saved into a animation collection
2. Open an existing animation, then make a new empty animation
3. Change from seconds to fps, or add a new property to animate ()
4. Editor crashes

NOTE: It is slightly random and I have not found a perfect repro

### Minimal reproduction project

N/A (TBD?)
if (check_rect.has_point(pos)) {
				EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
				undo_redo->create_action(TTR("Toggle Track Enabled"));
				undo_redo->add_do_method(animation.ptr(), "track_set_enabled", track, !animation->track_is_enabled(track));
				undo_redo->add_undo_method(animation.ptr(), "track_set_enabled", track, animation->track_is_enabled(track));
				undo_redo->commit_action();
				queue_redraw();
				accept_event();
			}
			
			if (path_rect.has_point(pos + Size2(type_icon->get_width(), 0))) {
				clicking_on_name = true;
				accept_event();
			}
			if (update_mode_rect.has_point(pos)) {
				if (!menu) {
					menu = memnew(PopupMenu);
					add_child(menu);
					menu->connect("id_pressed", callable_mp(this, &AnimationTrackEdit::_menu_selected));
				}
				menu->clear();
				if (animation->track_get_type(track) == Animation::TYPE_AUDIO) {
					menu->add_icon_item(get_theme_icon(SNAME("UseBlendEnable"), SNAME("EditorIcons")), TTR("Use Blend"), MENU_USE_BLEND_ENABLED);
					menu->add_icon_item(get_theme_icon(SNAME("UseBlendDisable"), SNAME("EditorIcons")), TTR("Don't Use Blend"), MENU_USE_BLEND_DISABLED);
				} else {
					menu->add_icon_item(get_theme_icon(SNAME("TrackContinuous"), SNAME("EditorIcons")), TTR("Continuous"), MENU_CALL_MODE_CONTINUOUS);
					menu->add_icon_item(get_theme_icon(SNAME("TrackDiscrete"), SNAME("EditorIcons")), TTR("Discrete"), MENU_CALL_MODE_DISCRETE);
					menu->add_icon_item(get_theme_icon(SNAME("TrackCapture"), SNAME("EditorIcons")), TTR("Capture"), MENU_CALL_MODE_CAPTURE);
				}
				menu->reset_size();