I am using 2018.5. I cannot SSH into the router via LAN IP if I am on 5G wifi. Works just fine on 2.4G wifi. And it looks like file sharing has the same issue. Internet works for both on 5G and 2.4G, and I can ping the router LAN IP using both 5G and 2.4G wifi. Any idea? Settings attached. Basic->Network: 2.4G and 5G same WPA/AES phrase. Intention is to have 2.4G and 5G SSID the same, however I could not do this as I am having the 5G wifi issue mentioned above. So right now, the 5G wifi SSID was appended -5G in the end. Advanced->VLan: I did not change anything there. It is default setting. Administration->Admin access: Changed default SSH port #, and restricted to key login only. Any help is appreciated. For now, I am falling back to use the 2.4G if I need to SSH in router or use file sharing, which is a pain. One other issue may or may not related: 5G wifi setting 80 MHz channel width seem to have some issue. Setting 80, and overview shows 40. Setting 40, and overview shows 40 as well. Tried different countries, same results.