Option + Space to open terminal means the command I type doesn't work

I have Option + Space set to open my terminal.

It sometimes adds a space character to the command line. So before I start typing, a space character is already there. This means I end up typing (for example) ` git bisect start` when what I want is `git bisect start` (no space at beginning).

The command does not work when there is a space at the beginning. This is specific to WebStorm terminal, because I have tested in other terminals and the same problems doesn't occur.

I have already reported this as a bug ( https://youtrack.jetbrains.com/issue/IDEA-179006  ) but unfortunately it hasn't been picked up.

Am I doing something wrong? How can I get around this?