iOS 15.4.1 issue with App

Since upgrading to iOS 15.4.1 I've been having issues with the App.

The main issue is that it will often freeze when moving to the group screen and it becomes impossible to click on anything or go back to previous screen. This has also been reported by other users in the Facebook group in the last 2 days.

Additionally the background images used for the groups are different to the the images that are shown when using 15.4 or accessing through the browser.

Also the Add Alarm and Add Thermostat options are greyed out in the settings section.

None of these issues exist on my other phone which is still on 15.4.

Photo attached showing difference...

Have tried deleting and reinstalling app, logging out etc, but the same issues persist.

Today everything appears to have gone back to normal