Not Chaining

I am creating a long scenario (it was 300K!) I see that the recorder should auto chain:

In case of long scenarios (more than 50 requests), the recorder will split them in chains:


val chain_1 = exec(...)...
val chain_2 = exec(...)...

val scn = scenario("My Scenario")


However, the recorder is not auto chaining, is there something I need to configure?