There should be break in-between subjects (for a good reason)
As the title says, there should be a 10 mins break after one subject paper gets submitted as the students who don't have any other paper can leave the exam hall and the students with another paper can give their paper in silence after they have left, I had my English and maths exam on 19th and right after English exam ended majority of the students started discussing and leaving which creates disturbance for students who have to attempt maths test, also I had a invigilator come up to me to ask if I had a second paper like dude just check the screen