Camera on iPad error?

[Alan]

I've submitted an app update to the Apple store and have been rejected with the following error:

"We discovered one or more bugs in your app when reviewed on iPad running iOS 11.4.1 on Wi-Fi connected to an IPv6 network.

Specifically, when tapping on the camera button, no further action took place."

I'm using mobilePickPhoto to call up the camera with LC 9.0 - has anyone else seen this problem?

cheers

Alan