Behaviour after opening attachment

When I click (touch) on an attachment, there is a window that opens and asks me "Open with..." and there I choose a program to open the attachment with. Now, that window does not close automatically after choosing the program to open the attachment with but instead needs to be closed manually by clicking (touch) on the X on the upper left corner. Is that the desired behaviour? - I was used with the behaviour when the window automatically closes as it's not needed anymore.

UBports OTA3, Meizu Pro 5