iOS unable to access file system

We have an ionic app which access the filesystem to upload files/photos using the <input #file> method, see below code. The issue we are seeing on iOS some of our users can access the filesystem via below method without issues but then some users nothing happens when clicked even with the same updates.

Anyone else experiencing this same issue? Any better work methods? The APP is a PWA so looking for a solution that can work in the Web browser.

<input style="display:none;" type="file" (change)="fileEvent($event)" multiple #file>


getFile() {