WiFi drops after reboot and shuts off after few minutes being on
I got this MBP in second hand recently and everything was fine when the seller was demonstrating to me. I even surfed every website possible for an hour. But then after I got it from him, I had to do clean up of the system to install latest macOS from recovery, here I already got glimpses of wifi problems. I got some error in between. I thought it was the Apple servers. Then finally after I got Catalina installed, when I go to the desktop the Wifi signal drops right after I login. When I got it stable by removing and adding from network, it appeared to have worked for a minute or so, then again it dropped and connected back. Since then, it’s toggling.
I am having hard time understanding the issue. I hope I don’t have to go back to the seller or the Apple service. Help!
UPDATE:
Added screenshot of error while using recovery. I didn’t get any errors using Hardware Test (Diagnostics)
UPDATE:
Please find the answer in the answer’s comment section.
Update (12/28/2020)
As @danj suggested I went ahead and changed the router password from where I was getting the WiFi signal from. Since then there has been no problem, and I could see the Mac get’s WiFi anywhere I go too. So, it was some strange error or misconfiguration within the OS or something with particularly my home router.
Esta é uma boa pergunta?