Trying to handle a timeout error before calling completeLastTransaction

[pauloya]

We're calling makePaymentRequest() followed by completeLastTransaction() when all is done and finished.
If we hold the call to completeLastTransaction() for 30s then a popup is shown "Apple Pay not Completed" for 1s and then everything is gone.
We're trying to understand why this popup shows so briefly and why it disappears by itself.
Also, is there a handler on the plugin that allows us to handle this timeout?