Capture session interrupted randomly

We are facing a strange issue where a small portion of our large userbase can not start the capture session in our app, as it gets interrupted with the following reason:

AVCaptureSessionInterruptionReasonVideoDeviceNotAvailableWithMultipleForegroundApps

Our users are all from iPhones, no one is using an iPad. Just to be sure we have set

 session.isMultitaskingCameraAccessEnabled = true

but it does not seem to make any difference.

Another weird interruption we are seeing

Capture session interrupted randomly
 
 
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