Guake opens two tabs instead of one

**Describe the bug**

When spawning a new tab from command line with command parameter `-e`, there are two tabs opened instead of one.

**Expected behavior**

My command opens one tab with title set to `Test title` and executing `echo 12345` in it.

**Actual behavior**

I try to spawn a new tab using a command below, but actually two tabs are opened - both in the same directory (`~/some-folder`), but only the last one executes `echo` command.

**To Reproduce**

Using from terminal (tried from `guake` and `konsole` separately, same issue):
```
guake -n ~/some-folder -r "Test title" -e "echo 12345"
```

-------------------------------------------------------------------------------

```
$ guake --support

Guake Version: 3.9.1.dev0

Vte Version: 0.68.0

Vte Runtime Version: 0.68.0

--------------------------------------------------
GTK+ Version: 3.24.34

GDK Backend: