I've been
pointed here albeit I think my issue is not exactly related to the one discussed here, as in Portugal I see the water bodies as landmarks and not as a special layer, and the issue I have is about sporadic errors while saving as a CM, so areas that half-belong to the country in the sense that no information is given that I can't edit the segments, but now and then there is one segment that I can't edit. I can add AM areas to myself to cover them, but it would be better to avoid that.
1.
Sines near the Sea - on the left half of my AM area
2.
Caminha near the river near Spain - basically the current diagonal city area, and the issue is not being near the border and conflicting with Spain, but the river
3.
River bay - I've had to ask to extend the area north-east because the top right corner of the permalink is also giving me errors. For example I can edit the segments but can't delete the (unapproved) rank1 cameras.
Please note that on the client I see blue correctly drawn over these three areas. Not the case of "flooded streets" at all, just inconsistent lack of permissions to save as CM.