Ring Device Live Feed Problems

Just wondering if anyone can help.

I have previously had a Samsung S8 that I have a RING app on for a security camera. This app previously worked with the live feed when no wifi available using my mobile data. I have now upgraded to the Samsung S21 Ultra 5G and the live feed no longer works using mobile data only with no access to wifi (works with wifi). Same SIM, no changes just the device.

Not enjoying this very expensive device…

Thanks in advance

Have you tried clearing cache, data, unintall the Ring app and then reinstall and sign back in? Working fine on my Ultra.