My Robot Doc

Known issue

YUKA / LUBA 2 AWD X: mower stops at night claiming the vision module is dirty when it isn't

The mower repeatedly halts during night mowing with a "vision/camera dirty" warning, on two different models, despite the lens being clean and daytime mowing working fine.

Status Open

Models
YUKA (2025) & LUBA 2 AWD X
First reported
21 Aug 2026
Last updated
03 Oct 2026
Affects
Vision module (on the robot) — not the app
YUKA (2025) & LUBA 2 AWD XFirst reported 21 Aug 2026Details
Models
YUKA (2025) & LUBA 2 AWD X
First reported
21 Aug 2026
Last updated
03 Oct 2026
Affects
Vision module (on the robot) — not the app

What to do next

  1. Safety first

    Before you try anything below, read the safety rules from your mower’s manual.

    Check the lens physically before treating this as the false positive: Mammotion's own troubleshooting will ask the same thing.

    More about this step

    Applies when: the vision-dirty warning appears during night mowing, on a YUKA or a LUBA 2 AWD X.

    Worked if: a genuinely dirty lens is ruled out, so what remains is the darkness trigger.

    Didn't work? Next: step 2 — If night mowing is not essential, schedule daytime-only mowing...

    Method: this page's own first instruction

  2. If night mowing is not essential, schedule daytime-only mowing until Mammotion addresses it. The warning is triggered by darkness rather than by the lens.

    More about this step

    Applies when: you need the mower working now rather than waiting on a fix.

    Worked if: the interruptions stop, at the cost of giving up night mowing.

    Didn't work? Next: step 3 — Tell us your exact version, or the version where it stopped. If...

    Method: this page's own third instruction

  3. Tell us your exact version, or the version where it stopped. If you have a support case open, reference the threads on this page so it reads as a pattern rather than an isolated unit. That detail is what turns this into a rollback-target guide.

    More about this step

    Applies when: you are hitting this, or you have a version where it stopped.

    Worked if: the pattern gains the version number nobody has supplied yet.

    Method: this page's own closing note (the version is unconfirmed for both reported models)

Vision module (on the robot) — not the app. See our app vs. firmware vs. RTK guide if you're not sure which one you're dealing with.

On this page
  1. What to do next
  2. What happened
  3. Why this looks like one fault, not two
  4. What to do if you're hitting this
  5. Sources
Exact firmware version not confirmed. Neither report below states which firmware version triggered this. Documenting the pattern as-is, across two different models, rather than guessing at a version number.
YUKA2 and LUBA 2 AWD X3 both show the same most recent official release, 1.30.29.8 (July 31, 2026), as the only published update before this report's date (August 21, 2026). That's a plausible candidate for the "last update" Mammotion support referenced, but neither source thread names it directly.

What happened

Video shows a YUKA 2025 repeatedly stopping mid-task at night, reporting its 3D vision module is dirty, while the actual camera/vision hardware was confirmed clean and the same mower mows fine during the day1. "It keeps complaining about the 3D vision model being dirty, but it's just dark out."

A different model, a LUBA 2 AWD X, showed the identical symptom (the same "dirty vision" false-positive), with Mammotion support saying it would be fixed in the last update, then that it'll be fixed in the next update instead. A separate, open Mammotion support case references the same issue1.

Why this looks like one fault, not two

Owners of two different mower families reported the same false warning in the same thread, around the same time: the vision-dirty alert set off by darkness, not by a dirty lens. At least one of them was told by Mammotion support that it is a known item that keeps coming back across updates. So it looks like one fault across models, even though no firmware version is tied to it yet.

What to do if you're hitting this

  • Confirm the lens is clean before you assume it's a false positive. It's worth ruling out physically, since Mammotion's own troubleshooting will likely ask the same thing.
  • If you have a support case open already, referencing existing threads (linked above) may help show this isn't an isolated unit issue.
  • If night mowing isn't essential, scheduling daytime-only mowing avoids this warning until Mammotion addresses it, since it's triggered by darkness, not an actual lens problem.
If you can confirm your exact firmware version when this happens (or a version where it stopped happening), let us know. That's the detail needed to turn this into a proper rollback-target guide.

Sources

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