Ah yeah, I run into that sometimes but in my experience its pretty rare that it won’t pop up. Sometimes just closing the app, from recent apps, and reopening will get it to trigger. I always assumed it had something to do with the apps save state when I closed it since it generally happens on my banking apps that automatically log me out. It’s one thing I like about iOS is that when you are logging into something there is the little key button to open up iCloud keychain and Bitwarden so you don’t have to let it do it automatically.