### 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?)
editor = p_editor;
}
void AnimationTrackEdit::_play_position_draw() {
	if (!animation.is_valid() || play_position_pos < 0) {
		return;
	}
	float scale = timeline->get_zoom_scale();
	int h = get_size().height;
	int px = (-timeline->get_value() + play_position_pos) * scale + timeline->get_name_limit();
	if (px >= timeline->get_name_limit() && px < (get_size().width - timeline->get_buttons_width())) {
		Color color = get_theme_color(SNAME("accent_color"), SNAME("Editor"));
		play_position->draw_line(Point2(px, 0), Point2(px, h), color, Math::round(2 * EDSCALE));
	}
}
void AnimationTrackEdit::set_play_position(float p_pos) {
	play_position_pos = p_pos;
	play_position->queue_redraw();
}
void AnimationTrackEdit::update_play_position() {
	play_position->queue_redraw();
}
void AnimationTrackEdit::set_root(Node *p_root) {
	root = p_root;
}
void AnimationTrackEdit::_zoom_changed() {
	queue_redraw();
	play_position->queue_redraw();
}
void AnimationTrackEdit::_path_submitted(const String &p_text) {