Blocked by obstacle but no photo

What could this obstacle be? There was nothing on the floor or there when i came downstairs in the morning to check. And it managed to get back to the dock with zero issues. Has anybody else gotten this message?

Hi,

Regarding your problem, you can try to wipe the camera and sensor.

If the problem still cannot be solved, please continue to contact us. (It would be better if there is a fault video)

Hi,

You need to send the fault information on your phone and the video to our after-sales service center (support.na@dreame.tech). You can tell them your problem, your product SN and your UID, and share your order invoice.

We hope the above information can help you.