Images not showing on kodi IOS remote app

I’m finding since i’ve started using the official IOS app on my iPhone alot of the images don’t show up when browsing the library in the app.Yet they display perfect on the HTPC running Kodi.

I\ve tried deleting the IOS apps cache as well as deleting the music library and thumbnail cache on the HTPC. Rebooting iPhone and HTPC then rescanned and synced the list. Along with cleaning the music library, but didn’t help. The app still not showing a lot of the pictures.

What is the best way to get all the images from the library to show on the IOS app?