Auto-possess isn't working on Play

Currently working on a matinee. My previous matinee worked fine, however after a couple months work I’m having issues getting my new setup going. The matinee is executed via the level blueprint, and the cameras move - but the player controller doesn’t automatically possess the cameras, and I have to manually hit possess. This isn’t ideal for recording haha, is there any way to get this working again? Let me know what screenshots are needed!