how to limit task number in file copy/move queue?

[ylliatte]

copy multiple files, press F5, F2, the queue function still runs 2 sessions at one time.
Image: https://ibb.co/vd4X8kC
Is there any way to limit tast session to 1 by 1?

[white]

They do not run at the same time. One progress bar is for the progress of the current file. The other progress bar is for the overall progress.