### 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?)
text += TTR("Rotation:") + " " + String(t) + "\n";
				} break;
				case Animation::TYPE_SCALE_3D: {
					Vector3 t = animation->track_get_key_value(track, key_idx);
					text += TTR("Scale:") + " " + String(t) + "\n";
				} break;
				case Animation::TYPE_BLEND_SHAPE: {
					float t = animation->track_get_key_value(track, key_idx);
					text += TTR("Blend Shape:") + " " + itos(t) + "\n";
				} break;
				case Animation::TYPE_VALUE: {
					const Variant &v = animation->track_get_key_value(track, key_idx);
					text += TTR("Type:") + " " + Variant::get_type_name(v.get_type()) + "\n";
					Variant::Type valid_type = Variant::NIL;
					text += TTR("Value:") + " " + String(v);
					if (!_is_value_key_valid(v, valid_type)) {
						text += " " + vformat(TTR("(Invalid, expected type: %s)"), Variant::get_type_name(valid_type));
					}
					text += "\n" + TTR("Easing:") + " " + rtos(animation->track_get_key_transition(track, key_idx));
				} break;
				case Animation::TYPE_METHOD: {
					Dictionary d = animation->track_get_key_value(track, key_idx);
					if (d.has("method")) {
						text += String(d["method"]);
					}
					text += "(";
					Vector<Variant> args;
					if (d.has("args")) {
						args = d["args"];
					}