Hey there @Raky1! Welcome to the community!
This is definitely a weird combination windows/editor bug, I thought I had seen an issues thread for it before but the last one I saw was for UnrealEd (the level editor bundle) so not quite standard UE.
Similar issue looked into back last year but also not quite the same.
Running windows 10 I can’t replicate the issue (the editor reacts weirdly it’s by no mean lagging). I usually try and take a look into the source to see if a simple workaround would suffice but this is definitely going to need someone familiar with that interaction to be able to plan a fix.
Since there’s no current issue on this, would you like to submit an official bug report? When we get issues like this that aren’t reproducible everywhere it’s usually not much I can do this side but the team is definitely more capable!