…but it should also show a Join Accept response if the keys were accepted and the same gateway was selected to transmit that (or some error if all gateway(s) are busy). And the device’s Data page should show the activation too, if the keys were accepted.
I doubt that would be affected by the earlier network problems. But maybe it is.
Orange/yellow uplink for a Join Request, and a green downlink for its Join Response:
(August 2017 screenshots.)