Resolve JMeter Thread Group loop count is invalid

The following is the difference between setting the number of cycles in a JMeter thread group and setting the number of loops in a loop controller

1. JMeter generated script does not have STEP1 controller, so the loop is set in the thread group
   

2. The Badboy recorded script has a SETP1 controller, so the loop is set in the controller

3. Badboy a recorded script after removing the STEP1 controller fails to use the phenomenon

Specifically why this situation, to be followed by the update instructions ...

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Resolve JMeter Thread Group loop count is invalid