Virus in app??

I have an issue with my apple account I believe. Switching from one app to another it will kick me back to home screen, or app just will simply not open without re boot of my phone by powering off. I thought this was a phone virus however I have switched phones with my son and upgraded to a brand new iPhone 11 and he has no issues with the phone I had and now my new iPhone is doing the same thing as before. Every app even includes my camera app that came with the phone..... help please