text: I noticed the rendering effect of the broken multipolygon, that you describe, a few days ago, i.e. the river Thames was showing in white instead of blue in this section (up to London Bridge). It was particularly noticeable in the Humanitarian map layer. I also noticed that another mapper had updated the multipolygon (www.openstreetmap.org/changeset/69231890) and now the river Thames renders correctly for me (in the Standard, Cycle Map, Transport Map and Humanitarian map layers). So, I assumed that the issue had been fully resolved. What are you using to still see the broken rendering and could it just be that there is a lag time in the rendering catching up with the map update?