tieke:
Annoyingly I've had to switch back to my Redmi Note because the wifi on the 4a frequently just stops working. No issues with the other wifi connected devices in the household, and both the router and pixel have been updated/rebooted.
Sometimes it seems to work fine and then other times there are huge lags/"no internet connection" notifications. Only noticed after I had spotted that it was frequently only connecting to mobile data despite wifi being available. Had been working until recently, so will leave it for a month and see if there are any appropriate updates.
I've not noticed anything like that - it actually works better than my old phone. I don't think updates will help you. Does it happen just for one WiFi network, or does it do the same on all networks? If it's all of them I'd call it faulty and have it replaced. If it's just one, then look at that network. Mine is fine on my work network (Cisco maybe) and my Fritzbox 7590.