https://imgur.com/a/j48mTsW

Here is an example. I can see the river running through the middle of the blue oval (I circled the river), but it appears to tail off towards the ends of the oval. But the river is drawn across the whole map when I can’t see any clear indication of the river continuing.

(The picture comes from edits I made on 24th Oct 2019 around 1530 BST)