Robotics has been paid a lot attentions because of its wide applications, like explore unknown planet or rescue people after earthquake or fire. In a group of mobile robots, robots are usually weak and are easy to get crash, especially working in dangerous or harsh environment. Unfortunately, to the best of our knowledge, only a few studies address on robot failure, especially transient failure. Therefore, in this paper, based on a pair of fault tolerant flocking algorithms which we proposed, we discuss if it is possible to make robots work together once robots' memory experiences corruption. Otherwise, we further explore the reason and then try to revise the existing algorithm to make robots self-stabilized.