Not sure if that is Manjaro related, still want to ask you.
I have an issue with my WIFI - it is terribly inconsistent. I can se WiFI networks, can connect to them, but it is very difficult to do anything as the connection comes and goes every few seconds/minutes. Sometimes there days it is very good, sometimes it is very bad (like today). I think this can be related to ISP router (Virgin Hub if that matters), reboot helps just for a time being. How can I check that at my end in order to report problem to ISP provider (if that’s the case)?