App logouts

I have Ring doorbell button for probably 2 years. Don't really remember by now. And it basically works (or should I say - malfunctions) the same way all this time. I have app installed on iPhone, paid account. Receiving alerts, no issues there. Usually someone is always at home so alerts do not bother me. But every time I actually need to see what is going on the app is asking for login. Literally - every time. And when I login it says "Ring account was signed in to on a new device". How is it possible if I am receiving alerts on this device and I signed in with this device many times? Please, fix your app as it does not work in those moments when it is critical for it to work.