Can not get rid of robot created low-lying area

while cleaning family room, robot created low-lying are that does not exist.....I tried to delete but the app will not delete it...there is no area there just a corner of the couch

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app asked me to save, but does not go back to previous page...just asked to save or cancel...nothing happens when I save....but to get out of the page, I cancel and the low-lying area is still there

Good morning. Does the robot perform poorly when cleaning this area? Could you please run another cleaning cycle. If the erroneous low-lying area still remains, kindly send us photos of this zone, a screen recording showing your operation steps on the mobile app, upload your device logs, and provide your robot’s model as well as SN number so we can further analyze the issue. We sincerely apologize for the inconvenience caused. Looking forward to your reply.