Approval level is Role, but request goes to escape path when 1 of the roles, does not have owner

Hi all,

The Task setting at stage level(there is only 1 stage) is 'System and Role' is shown below. There are 2 roles in my request. one has role owner, and the other does not. but the request goes to Escape path. what can be the reason. I have tried with level = role. but request still follows escape path