I have the exact same issue but I only have it when I run the app on my real iPhone.
It also seem to have happened when I updated it to ios 18.3.2 which I cannot confirm using an emulator since that version is not downloadable yet. Moreover, I have a friend whose iPhone version is older and there the app works from TestFlight as well as the emulators with version such as 18.2.x.

I am really banging my head against the wall with this issue...
Any help would be appreciated.

PS. I tried the above steps but no success.