App not opening / working iOS 15

My app has stopped working since yesterday morning Thursday 23 September. I have the last app version 3.11.1 from 2 days ago and on iOS 15 since Monday.
Sometimes app opens, I can scroll down transactions then it quits.
Other times I just get the opening logo and quits.
Any explanations?

I’ve deleted and downloaded the app again, and seems to have fixed the issue.