Thanks for your patience while our team was looking into it. We've tested these ads on an iPhone 12 and couldn’t confirm any issues — the ads displayed and closed normally, and rewards were granted correctly after closing. This rules out any issue with a specific ad or a specific provider. Could you also check your device's settings to see if anything has been changed that could affect this? Something like Display Zoom in Settings > Display & Brightness. Perhaps restoring default settings could help in this situation.