iPhone 16 Pro Max Issues

I have an iPhone 16 Pro Max. Lately it has force closing my Pandora App, I am having issue with my apps that I use for traveling like my airline, hotel and rental car apps. They are constantly being logged out, shut down and just randomly close on me. Before you ask, yes I have restarted the phone several times, i have deleted and re-downloaded the apps several times, I have checked my storage, I have checked what is running, I have made ALL the changes it says to make and I am still dealing with this. I use my phone for personal and work purposes and I cannot keep dealing with issue. Does anybody know what the deal is? I have only had this model for a year