Change Going to the next phase without closing tasks

Experts,

We are on HP SM v9.41 P4 hybrid

During the upgrade from SM9.21 , it migrated legacy change workflow . After the migration, while testing, whenever the change is moving to the next phase without validating the open auto tasks.

In the 'Additional phase information' , i have got the flag set to false for 'Move to next when tasks are open'. 

Which is the rad application responsible for checking 'dependent tasks'

please guide.

thx

dev