I’ve been running into this a lot today; Airplaying videos from Safari to my Apple TV would stop working if the screen locked, and trying to bring up 1Password through the integration with the system fails around 80% of the time. Sometimes the app in the background would crash, and the rest of the time 1Password just wouldn’t appear.
As nice as some parts of iOS 13 are, it is by far the buggiest version I’ve used yet.
I had thought I’d seen this bug reemerge. I wasn’t affected by it last time, but I’d noticed I was seeing the loading splash screens of most of my installed apps a lot more often than I used to.