Webview - iOS and Android show different content!

Every week I replace the pictures to be shown via webview. I upload the new file with the same name to my servers, so I do not need to change the link in Adalo every time. Starting in week 2 there was a problem. The new pictures were shown in the iOS app BUT the OLD pictures were still shown in the Android app. Pictures provided. So I needed to change the link/name of the pic so it worked for both. But this seems to be a bug! I cant change the links everytime.

Can you help me?

New file shown in iOS

Old file shown in Android

You can see - the dates are different