If you're experiencing areas of non-responsiveness when tapping or dragging within certain apps, it is likely due to the way the app is designed. In some apps, the touch-sensitive hot zones (the regions on the screen that are meant to respond to your input) can be too small or improperly configured. This can result in the touch not being recognized or acted upon, especially if you're trying to interact with specific features or elements near the edges or in less responsive areas of the app. It is recommended to check for any available updates for the app in question or uninstall and reinstall the app will help reset the app's settings and ensure that everything functions correctly.
If the issue persists, report the issue to the app developer for a solution.