Using "GetCurrentFrame" crashes app.
"The crash is due to the default constructor of FAppleARKitFrame being called by the above mentioned blueprint function. That constructor fails to initialize fields that are accessed in the destructor. Note that the only reason we're calling the blueprint function is to determine if the tracking is valid on the current game frame - presumably a proper function for that should be provided as part of the augmented reality api."
Unable to break struct like pictured in this UDN: https://udn.unrealengine.com/questions/385956/view.html
Tested with ipad pro 2 - Logs from device attached (no debug symbols, so not sure if helpful)
Unable to test/package in Main.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-63223 in the post.