It seems the issue has fixed itself for me and some others.
I was having the issue on a Windows 10 desktop. Safari and Edge, IOS was fine. A Friend was having the issue too.
But like I said in my opening post, I’m not too fussed. My holdings are fine it’s just a visual glitch and only when you mouse over it.
I’ve heard this is an issue relating to AWS itself, so if that’s true it’s out of 212s hands.