I found the below answer to fix my intermittent Wi-fi connection:
Ubuntu connect drops. Worked for a while then started dropping again
Questions:
Can someone explain in plain English why would this work, because my connection was never asking for any other router's authorization?
Can someone also explain why the MAC device address entry is entered in the BSSID, while there is another MAC device entry in the same pop-up box? What is the conceptual difference between the two?