Yes, everybody should and I think everybody does. I am certain that on my machine, WD was the culprit. Now, after installing Avast, my icons refresh fast.
First of all, phoenix nowhere mentions the build he is on, he states he uses custom icons, so everybody else does that too? So what fact does support your "i think everybody does" statement?
I can speak for myself and my answer was written on the base of my experience because I had the same problem. I am using the latest build which can be downloaded through windows updates. It can only be Windows Defender or Windows Firewall which is causing the issue. When I change to any other antivirus suite, the annoyance disappears.
Latest official Build 10586 updated to 10586.164 with Windows Updates Never had this issue in Build 10240 BTW
thanks to your advice, after switching to Avast AV Pro or even any other AV for that matter, the issue never ever happened again