As mentioned yesterday, I’m personally intending to return 14pro max. However, turning off Wi-Fi and disabling back ups over cellular (as suggested on this thread) does seem to have “fixed” the issue. But of course it’s not the long term solution.. 24 hours since I did this and system data no longer filling up. I am on unlimited data plan so that’s not so much of an issue, but I’m just concerned that we’ll be stuck if Apple doesn’t fix this for months.. I’m still within the 14 day return window here in uk and much as I want to keep the phone, I just think on balance it might be worth sending it back until they come up with a fix..:/