This happened to me. I cleaned the suction cups and reseated it on the counter top. There is also a connection issue somewhere between the cup snd the blender. The next time it happened I started moving the base around and noticed the lights turned blue and then went off. I moved it around until they stayed on. Pushing the cup down while turning it to the right also helps sometimes. There is a grove the cup fits in in the base make sure it is clean as there is a connection there that somehow causes the blender to start when it the cup is locked in place. It's tempermental but for what we pay for them it's worth figuring out.
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