Same for me, spinning forever on Xperia 10 II, 4.4.0.68.
But the other issue is that it is nearly impossible to send a MMS. Had to toggle WiFi On/Off, play with the IP/Dual/IPv6, tried with VoLTE enabled/disabled, to be able to send. As of now no clue off the proper setting. This is way worse since the .68 update, have not been able to receive a single MMS since the update.