### Godot version

4.2 RC2

### System information

Any

### Issue description

https://github.com/godotengine/godot/assets/61938263/42ed582f-7b87-424c-8d19-ba0650ead5aa

It should not be reset by pausing.

### Steps to reproduce

Pause AnimationPlaybackTrack

### Minimal reproduction project

N/A
to_delete.push_back(K.key);
		}
	}
	while (to_delete.front()) {
		NodePath np = to_delete.front()->get();
		memdelete(track_cache[np]);
		track_cache.erase(np);
		to_delete.pop_front();
	}
	track_map.clear();
	int idx = 0;
	for (const KeyValue<NodePath, TrackCache *> &K : track_cache) {
		track_map[K.key] = idx;
		idx++;
	}
	track_count = idx;
	cache_valid = true;
	return true;
}
void AnimationMixer::_process_animation(double p_delta, bool p_update_only) {
	_blend_init();
	if (_blend_pre_process(p_delta, track_count, track_map)) {
		_blend_calc_total_weight();
		_blend_process(p_delta, p_update_only);
		_blend_apply();
		_blend_post_process();
	};
	clear_animation_instances();
}
Variant AnimationMixer::post_process_key_value(const Ref<Animation> &p_anim, int p_track, Variant p_value, const Object *p_object, int p_object_idx) {