Cyan anomalies on monitor screen

In the last week I noticed a pronounced "cyan anomaly" when playing games (but also present on likes of MS Money). I attach a couple of screenshots by way of example.

Not sure what they are and why? Thought it was my graphics card so replaced that (upgraded to a rather tasty NVidea GTX 1660 Ti) but the same problem persists.

I have two monitors, the main one is a BenQ GL2780, the secondary a BenQ RL 2455. The cyan anomalies were always on the main monitor i.e. when I swapped the game over to secondary the anomaly disappeared.

That was until today when I find that the anomaly is now only on the secondary monitor (the RL 2455) but not present on the primary.

Aargh! Very confused .What is the problem? Can't be graphics card, can't see how it is monitors(?).

Have tried resetting monitors to factory, also swapped out all cables trying numerous combinations.

Any ideas? Any and all assistance gratefully received...

Windows 10 Pro version 2004
Nvidea drivers up to date v 26.21.14.3200

You need to rather take a photo using a phone or a camera , those photos cant show what's going on with monitors

Thanks for the observation nIGHTmAYOR - greatly appreciated...

FYI I have reposted in this thread:

REVISED - Cyan anomalies on monitor screen