I'm running into the same issue and I'm wondering if it has something to do with the target OS of my app. I'm currently targeting iOS 12. How about you?

I think I've found the answer here. It looks like we need to: Support multiple windows using the UIScene lifecycle List the supported intents in your Info.plist Support the application delegate handler call (which we already did) I'll give it a shot and let you know how it goes

I believe the issue is probably that you are missing some of the requirements for in-app intent handling. According to this WWDC session, these are the requirements: Add support for multiple windows using the UIScene lifecycle List the supported intents in your Info.plist Support the application delegate intent handler call (which you have already done)