I also have a similar problem. Since the update to “Sauna”, the last functioning banking app also crashes. As soon as I enter my PIN in the ING app, the program crashes.
I actually wanted to release another device for the move to another system. Now I have to wait for a release pin by post. Although I’ve been using Sailfish since Jolla 1, it just confirms to me that there’s no future in this. All the important functions that you unfortunately have to rely on today via smartphone don’t work.