3 sourced reports, with what to check before you buy. Each one links to the page it was reported on.
Costly or dangerous
X30 Ultra interrupts tasks, fails to attach mop pads, and acts lost
An owner on the official Dreame forum describes the X30 Ultra constantly interrupting cleaning, failing to attach mop pads, acting lost, and occasionally editing the floor map. Dreame's own after-sales reply points to the mop-pad holder magnets, the washboard, and sensor/wheel obstructions as checks.
What to check. Before buying, expect that mop-pad attachment and navigation can fail intermittently; check the mop pad holder magnets and clean sensors/wheels first, and confirm warranty/return terms since the owner reports the unit being unusable.
X30 Ultra right drive wheel blocks and robot drives in circles
A German owner reports the right wheel blocking completely three weeks after purchase, with the robot driving in circles; the seller offered only a refund, not a replacement.
What to check. Drive-wheel failure can occur early (within weeks) and may leave the robot unable to navigate; check the return/refund policy before buying, as the owner was offered a refund rather than a replacement.
X30 Ultra loses dirty water when returning to base station
An official Dreame German-forum troubleshooting reply addresses an owner's report that the robot loses dirty water when returning to the base station, listing checks on the wastewater tank seal ring, the cleaning tray's overflow sensor, and the wastewater drain.
What to check. In the EU market, expect possible dirty-water leakage at the base station; the official fix is checking the wastewater tank seal ring and cleaning tray, which is a DIY maintenance item rather than a full unit failure.
These reports come from the pages linked under each item: owner forums, repair guides and workshops. They are not a diagnosis of any one unit, and a careful check of the one you are buying still applies.
Text from the Kriko Robot vacuums catalog, version 0.1.2, under the CC-BY-SA-4.0 license.
