WiFi Connections on Nighthawk RAX80 Timing Out?

Hi! I appreciate the suggestion, but I have already contacted tech support twice--once during the initial set-up and then about a week later when devices seemed to start dropping off my wifi network, i.e., when they haven't been used for a while. (I say "dropping off" because I have to wait several seconds for them to connect to the network, something I have not experienced with previous routers.) I have also purchased an extended warranty, but the problems I'm running into seem pretty basic. For example, my 5G network seems to "disappear"  periodically. At other times, even though I'm able to see and log onto it, I get error messages that I am not connected to the internet. The most frustrating is when, for some reason, it suddenly tells me that my password is incorrect. (I can assure you that's not the case.) It's a bit awkward trying to call tech support whwen there's not just one issue, but a combination of issues (that may not even be in effect at the time I make the call). As I've written elsewhere, when this router is functioning properly, it lives up to its promise. However, I certainly did not anticipate having so many problems with a router in this price range. (BTW, I have done IT work in the past, so I am not unfamiliar with configuring a wifi network.)