Hi,
Thank you for writing to Microsoft Community Forums.
In this scenario, we would suggest you to uninstall and reinstall the app on your iPhone and check.
If the issue persist, we would value your feedback or suggestions based on your experience using Edge. You can certainly help us improve the features by sharing your feedback. You can: Open Microsoft Edge. Click on the Settings & More Ellipsis (…) on the right hand corner and then, select Help & Feedback and select Send Feedback.
Regards,
Aditya Roy
Microsoft Community – Moderator