do you have a third party antivirus installed or only windows defender?
No, only Windows Defender. I'll try disabling it tomorrow, see if it helps.
Does this happen in small/empty projects?
I don't know, to test this I will have to actively edit the project for a prolonged period of time - maybe 20 minutes, maybe an hour.. These periods of lagging are very random.
As ever it's difficult to provide any help whatsoever without the information requested by the bug report guidelines.
Thanks for checking those chrome profiles!
I don't have any other information unfortunately. I understand there is probably something specific to my setup (maybe a combination of hardware or drivers), that is causing this issue. If I find a certain way to reproduce it, I'll log a bug report.