First day of month is incorrect in calendar[V5]


I have a problem with calendar when locale is ‘fa-IR’ and firstDay is 6.
in this case first day of Jalali calendar month is in previous page and month number is based on Gregorian calendar.
f7-calendar 2

in this github issue apparently problem is solved, but that issue is related to previous versions of F7.

Has this problem been fixed in version 5 or does it exist?
How to solve this problem?


I solved this problem with the help of this GitHub issues and this jsfiddle example