I unfortonately noticed that the Waymarked overlays are failing to render some route segments, and even some complete routes.
So I’ve taken the various Waymarked overlays offline while doing a fresh database import once more. Unfortunately this will take a few days before everything is back to normal again.
Unfortunately this has happend for the second time this year already (I first noticed this while preparing slides for my FOSSGIS 2017 talk).
I don’t really know what is causing this yet, all I can tell so far is that this must happen while importing change sets as after an initial import all routes were completely there.