Hi @ccatt
Welcome to the LastPass Community.
It may be that your phone is considered a 'trusted device', so LastPass stays logged in unless you reboot or shut down.
Does LastPass operate as expected on the mobile device, or do you have to search for the app to sign in/ activate it in the background again?
Can you also specify which device you're using with LastPass?
Can you confirm the exact iOS version in use with LastPass?
I have an I phone 13 pro max. yes I keep having to sign in/activatge it in the background again.