Strange Tile appearing over River Clyde, Glasgow, UK

Do you have any add-ons in your Community folder? If yes, please remove and retest before posting. No

Are you using Developer Mode or made changes in it? No

Brief description of the issue:
Just North West of EGPF there are patches of grey over the water texture of the river. From an aerial perspective it is actually an overlying tile covering parts of the river and the landscape.

Provide Screenshot(s)/video(s) of the issue encountered: https://pasteboard.co/K43I7I4.jpg
https://pasteboard.co/K43Kmuo.jpg

Detail steps to reproduce the issue encountered:

PC specs for those who want to assist (if not entered in your profile) i5 6400, 16 gb ram, geforce 1060 6gb. windows 20H2

Build Version # when you first started experiencing this issue: 1.16.2.0

Are you on the Steam or Microsoft Store version? MS Store

Did you submit this to Zendesk? If so, what is your ticket #? no

Looks like the sim thinks the river is something other than water in a few sections?

Yeah I thought that. But the over head shot seems to show the land within the tile is also affected. Hopefully it will be sorted in the future.