WIFI Calling Preferences Being Forced to Cellular Preferred

I am not a techie and I do not understand but I am having the EXACT same problem!!! Started a few days ago. If/When I enable Wi-Fi calling, all my phone does is CONSTANTLY ping back and forth between wi-fi and cellular preferred. I'm home all the time and my wi-fi is fine. I have tried turning off/on my phone, turning off/on wi-fi calling, turning off/on wi-fi connection on the phone and NO LUCK to resolve. (Well, other than leaving wi-fi calling off, but that's not a solution.) I have no idea how to fix it but the constant back & forth makes texting impossible along with other issues. Is there a fix at all that I can understand and do? Why did this start happening when I've had no problems before? Please and thank you!