I have tp-link AX3200 router that, unlike others routers that I have swapped in, required me to redo the Wi-Fi connection on all my devices even though I used the same SSID, security and password. I believe this might have been tied to Smart Connect. In set up, it made all bands the same. In testing a challenge with “Hide SSID,”  I discovered that if I disabled Smart Connect and changed an SSID on each band and then later re-enabled Smart Connect, it too caused Wi-Fi connections to be redone on a number of devices, even though the Smart Connect level was still the same SSID, security and password. I am wondering what information is stored on devices in establishing a Wi-Fi connection that makes it appear different even though it is the exact same SSID, security and password… for example is the lower level SSIDs being included in the packets, MAC is different, etc.?