It would be helpful to have the entries displayed from the 'modification log' tab in the patron record sort by date descending as the default so that staff can view the newest changes at the top of the page rather than having to scroll to the bottom.
As far as I can see, this is a problem for other "modification logs" too, not just patrons. I have seen it for record modification logs.
I've just tested this and it sorts the newest entries to the top for both, the log viewer and the patron modification log. This looks like a duplicate to bug 25968 that has been fixed in 20.11. *** This bug has been marked as a duplicate of bug 25968 ***