Hi,
The relation changed does not cover that section of river. 
See https://www.openstreetmap.org/relation/14728907#map=15/-33.3051/115.7058

And see https://www.openstreetmap.org/way/13653235#map=15/-33.2950/115.7249

If you want change the relation outer way to include sections of way 13653235. 

Note The editor Id does not handle relations well, JOSM does a better job - it is a more complex editor. 