Yes, well known issue now. My experience is on ios18 in UK on EE network. EE isn’t aware of it as a main issue at the moment, though I called them to troubleshoot the issue before realising it was a modem firmware issue with Apple (ohoh Apple!) this is the joy of trying beta products. Hopefully will be fixed soon. Isn’t a massive issue for me at the moment though if anyone finds a fix would be good to know. Think it is a modem firmware issue that can’t be rectified right now.