Game Center: Report achievements after playing offline?

Hello!

I just implemented the GameNetwork plugin for iOS Game Center.

However, when I report a complete achievement while the device is offline, the achievement is lost and not reported later.

In Apples Game Center Programming Guide it says:

Whether reporting progress on a single achievement or on multiple achievements at once, your game rarely needs to do anything specific when an error occurs. If an error occurs, such as when a network is not available, Game Kit automatically resends the data at an appropriate time.

Is that also true with Corona SDK? Or do I manually have to keep track of the achievements and resend them?

Thank you in advance!

Best regards,

Björn