In the last part of the last episode of the third season, when Jonas and Martha traveled to the origin world to prevent a car accident, they were briefly caught in the emptiness of time between the destruction of the origin world and the birth of two new sick worlds. The two each saw each other's childhood, and were seen by the other's childhood through the closet/basement.
In the exchange between the two after the two successfully prevented the car accident of the watchmaker's son and daughter-in-law, we know that Martha at the time remembered seeing Jonas through the closet as a child. If Martha remembers, it means that this happened in the previous cycle, and it happened in the current Martha when she was a child! Prove that they still haven't broken the cycle!
However, the plot ignored this and continued to play according to the logic that this happened for the first time, making them disappear, and successfully destroying the breaking cycle and destroying the new two worlds.
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