Similar experience here, Larry. My iPad Pro 11” is connected wirelessly to a Linksys router which is Ethernet connected, although the source is an AT&T WiFi router. It is a 5Ghz wireless connection. My other devices (both PC and Apple) connected wirelessly to the same router do not have this issue, although they are mixed 2.4Ghz and 5Ghz.
I have the same problem where my iPad Pro disconnects, and then I have to go in and reconnect it manually or wait several seconds for it to realize that it has disconnected. All of my devices are on the latest versions of o/s software.