KDE Menu items that run scripts whose filename has spaces are stopping at the first space

I'm having an issue running shell scripts in a terinal window that are launched from the KDE Menu. Specifically if the script name or location has a space in the name.

I've got some backup scripts that I want to launch from the KDE Menu and I want to see their progress as they run.

Here's a test script:

#!/usr/bin/bash
echo 1
sleep 1
echo 2
sleep 1
echo 3
read -p 'Stop here to read the log' temp </dev/tty

#!/usr/bin/bash
echo 1
sleep 1
echo 2
sleep 1
echo 3
read -p 'Stop here to read the log' temp </dev/tty

Let me demonstrate it working when the filename does not have spaces, test123.sh.

Here's the Item I added in menu editor:
Screenshot_20250913_123319.png

Heres the Advanced tab where I've checked "Run in terminal":
Screenshot_20250913_123409.png

Here's the proof of the script running and working:
Screenshot_20250913_123435.png

Now I'll rename the script to 'test 123.sh'
Screenshot_20250913_123646.png

I'll create a new KDE Menu item:
Screenshot_20250913_123733.png

Heres the Advanced tab where I've checked "Run in terminal":
Screenshot_20250913_123753.png

Here is what happens when I run it from the KDE Menu:
Screenshot_20250913_124001.png

I get a failed terminal window where you can see it fails at the first space.

I've done a bit of research trying to get to the bottom of this, its my understanding that kde-ptyxis is the default terminal application for Bazzite, so I've tried the following:
Screenshot_20250913_124504.png

I found if add double quotes and I escape the double quotes and use ptyxis (instead of kde-ptyxis) then it works:
Screenshot_20250913_124833.png

So I was able to use this as a work-around for my menu item (and it doesn't require "Run in terminal checked"):
Screenshot_20250913_130203.png

However when I was looking at the .desktop file, I notice it changed the executable to:

-x '"/var/home/smerkin/test 123.sh"'

-x '"/var/home/smerkin/test 123.sh"'

And this is reflected when you close the KDE Menu editor and re-open it.

Of course this also works at the command line.
I can't upload any more screenshots.

My curiosity made me test this again using the single and double quotes in the Program field but I get a error when trying this.
I can't upload any more screenshots.

Anyways, while I have a solution, it does feel like a work-around and not entirely correct behaviour. I did find this post online and the screenshot reflects my same issue while being for a completely separate project. It's on the gnome gitlab for ptyxis Issue #219 nautilus+ptyxis "Run as a Program" fails if path contains spaces.

I am posting all of this here in case someone else has the same issues I did. I had a lot of help initially in the KDE Discuss forums which was a great help but ultimately I think the issue is something related to Fedora, ptyxis and Bazzite, exactly where is beyond my skills.

KDE Menu items that run scripts whose filename has spaces are stopping at the first space

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