Iosapp hanging reinstall required

Hi all, Just had a week of Zwift ( I know lazy😀). Restarted monday. ever since then, when i open the app (on my iphone11pro). it looks like it hangs in the initial load screed (spinning wheel stops spinning next to my name). Then thats it.

Only way around i have found is to uninstall app, re-download and sign in again, do my ride.

come back another day.

i am having to do this every-time i want to ride or log in.

i am hoping this is something someone else may have found and can offer some advice.

My set-up is iphone11pro-iwatch-Tacx Vortex, same for 7months now this is my first real problem.

(phone and watch are upto date)