Currently when a command fails in some way, you are presented with a "toast" at the top of the screen to alert you. This lurks around for a few seconds and then goes away, restoring the commands panel to its normal state. As the command is finished up, it wants you to be able to send others.
It is quite easy to miss this though, especially if you aren't looking at the page at the time. I like the idea of a notification that requires dismissing on the mobile view, as by its nature it is meant to be used in scenarios where you aren't necessarily staring at the screen all the time.
We will take a look at the command tab and try to make it more consistent with how the desktop commands work while retaining the mobile look and feel. We will keep the feature to let you see the currently pending command, add a notification of the success or failure of the last run command and possibly add an area to let you see the command history as in the desktop version. This will require some development time so will likely come in a future update to the Mobile plugin.