The app does not show all photos

[mnag-hoststar]

Expected behaviour

All photos should be shown under picture.

Actual behaviour

On the web cloud and on Android all photos are shown under pictures, but in the iOS app only a small selection of pictures are seen. It's not clear what the selection process is for showing only these select few images. None are shown that I uploaded after the 27th of December and even before that, not all pictures are shown.

Steps to reproduce

1. Upload a whole bunch of pictures at different date. Some a bit further in the past.
2. Look at them in the File browser.
3. Go to the photos tab at the bottom of the app.
4. Look at the photos

iOS version iPhone 8 Plus, iOS 11.2

App version 2.19.2 00021