I had never had problems with Intel WIFI card, all I did, check-mark "Automatic Connect" and will automatically connect it once reboot or turn on.. works for me on Windows 10 1803
I've seen some wireless adapters doing this. Give this a try: Go to device manager and locate your wireless card and open its proprieties The last tab should be power management Untick "allow the computer to turn off this device to save power" This trick works on legacy intel wireless adapters from 10 years ago, might help you
Those are both useful advice, but doesn't solve the problem for all of us. The link in my last post shows various settings to change and try out, and I've never seen some of them before.
My clean installs are usually in Audit mode - which doesn't sleep. I recently changed my Win10 install to log in as Administrator instead of Audit - which does sleep so I added "Settings for High performance Power Scheme". I'll have to check out what I've done on the next test system I do...