Unable to send data to mirrored session?

I am having trouble getting the new mirroring session API to send data to the companion device.

when starting a workout on my watch I call startMirroringToCompanionDevice and then go onto my iOS workout manager to handle it via the workoutSessionMirroringStartHandler, I set the delegate here and can confirm that it is indeed not nil within that function but when I go to send some data across I get an error saying the remote session delegate was never set up.

I noticed this same behaviour in the WWDC demo and have been unable to find a solution that will allow me to send data across the mirrored session even though I am able to control the workout session state(pause, resume, end) on both Phone and Watch.

Has anyone else encountered this issue? Anyone have a solution?

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  • WWDC23-10023

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Sending data between a watch app and its companion iOS app via a mirrored workout session is demonstrated in the Building a multi device workout app sample. You might want to give it a try, if not yet. If the sample has the same issue, you can file a feedback report with detailed steps to reproduce the issue, and post your feedback report ID here.

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Sending data between a watch app and its companion iOS app via a mirrored workout session is demonstrated in the Building a multi device workout app sample. You might want to give it a try, if not yet. If the sample has the same issue, you can file a feedback report with detailed steps to reproduce the issue, and post your feedback report ID here.

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