Possible to prevent multitail from closing "finished" command windows?

Assume a multitail call like the following: multitail -s 2 -l "long-running-command" -l "short-running-command" Now, I would like to have both windows remain open, even after they are finished. However, multitail will just close the "short-running-command"-window once it exits. Which makes it kinda useless for my use case. I know there are workarounds like outputting to files and tailing those instead, but I wonder if there is a way to keep the windows open in multitail even after the process is finished, without creating new files.