Error: Modified ad behavior Must fix
Publishers are not permitted to alter the behavior or targeting of Google ads. This includes implementing the AdSense ad code in a "floating box script," or altering the ad-targeting using hidden keywords or IFRAMES.
Solution
To restore ads showing in your app:
Review the policies and guidelines so you can understand and identify the issue
Fix the issues in your app and make sure it complies with our policies and guidelines
Upload the new version to the app store
Request a review. Reviews typically take a week, but sometimes take longer.
Note: If you think the app already follows our policies and product restrictions, go to step 4 and request a review.
What should I do
The ad format may not fit your App UI layout. Make some change according to your case.