The availability of the finished product in the process of sales would greatly help the project. It is a pity that so with the Apple application , it is good that the android does not have these problems.
Perhaps the problem is with a specialist or an IOS programmer. I'm sure they will find new ones or deal with the mistaken old composition.
I think the project team is already burning deadlines and may be looking for new employees to strengthen the development unit on the IOS system. As far as I understand, to develop and place the application in the store is not enough, it must be constantly adapted to the changes made by the developers of the operating system with the release of its new versions.