Ionic view: After some time icons and pic in ionic view not showing properly

Hi. We are using ionic view app(on iPhone) testing our ionic app. Having ionic pro account.
It was fine in the beginning but after some time, pictures and icons are becoming some circle or square.

Don’t know if it’s normal or it is because of the phone. The internet was fine.

Searching for this problem on internet a lot but seems there is not much use having this problem?

Please help if you have any clue.Many thanks:)))