Can't view detailed bill

I have a similar android app problem, for past 2 years.   The app can't "download" a detailed bill.  I'm using samsung (versions 10 to 23).   I get a black box error at bottom of app stating, "something has gone wrong, please try again later."   THAT has nothing to do with a PDF viewer.   If instead, I choose summary bill option, it downloads and can be opened in any of my PDF viewers.    However, if I move to a PC and use a browser, the detailed download is available.   It's also not a timing issue, such as i'm checking too soon after end of month (i.e. not posted yet).  If I navigate to my billing history, i can click on each months back in time for the year.  All summary downloads work, but i have to go back to May to get a detailed download to function.  In fact, only March and May 2024 are downloadable.  This implies file size or some other attribute is the causing the error in the app.