I have continually had wifi issues with this thing, irrespective of OS on the laptop. I was running Windows 10, had wifi issues. After I installed Ubuntu (not because of this issue, just because I wanted to move back to using Linux), I've had the same issue.
Note, I have a new router. This was happening with the Linksys mesh router I had before, and with the Netgear router I have now.
What happens is I suddenly lose connection to wifi, and cannot see any networks for a little bit. Then, I'll see the network name that i was just on, but can't connect.
I'm at the point of just buying a usb wifi card, but it's super annoying that a relatively new laptop doesn't have a reliable wifi card.