text: If you take a look here:
  https://www.openstreetmap.org/#map=17/38.95917/-8.97144&layers=C
  or here:
  https://www.openstreetmap.org/note/1931637#map=21/38.83202/-8.96648&layers=C
  you will notice there is a discrepancy in the river lines, which should meet and be straight. 
  Hence, the rendering seems to hold and mix old data with posterior modifications. 
  Anyway, I tried to alert the maintainers of the affected map layers. They probably have a clearer notion of what is going on (something due to incremental updates, eventually?).
  
  