Android 11 issue

Hi had a new ring doorbell 2nd gen. All works fine if viewing from Android phone in WiFi. If trying to view live view outside of WiFi network (on 4g connection which is ample) live view does not show.Now this worked on my wife's identical phone before the android 11 update, but not on mine already updated. Just swapped Sims etc to test and wife's phone automatically updated to 11 and now doesn't show live view. So I'm guessing that android 11 has an issue with the ring app as everything else works. Annoying however as main reason is to see who is at the door when at work!For reference we both run a Google pixel 3a. 4g is pulling approx 30mbps and upload of around 6/7. So speeds are fine! UK user.Any help greatly received.