Lag for m2 Macbook with one or two 4k displays

[itssr]

I'm also having this issue on my M2 Air.
It's highly frustrating as this has started recently, seemingly after an OS update.
It was not an issue a few months back.

It's not a memory issue as this was working without a problem a while back.
I have 2 x LG Ultragear and only using 1080p on them.