All vacuum robots, and even regular vacuums, can have problems with fringes on carpets. Generally robots cannot operate on deep pile carpets. Samsung even gives a specification of 1cm, too conservative found in practice. Samsung's larger wheels make it unique in handling slick carpets at which others fail. Very fluffy premium bath rugs still cannot be navigated.
One special problem applies to black carpets or black pattern sections. The light beams used to detect cliffs, stairs etc., are absorbed so the robot sees them as cliffs. The solution is to cover the cliff sensors with light colored tape for a false floor, and if there are cliff place a physical barrier. Most black materials do not produce this problem but carpet seems to be especially absorbent.