app.doScript on clipping mask action creates unwanted rectangle

[AJJ22656695e0lw]

Windows 10, Illustrator 26.0 
This is at least a bug but perhaps a security issue as well. 
When running this action manually, on a single jpg, I get the jpg nested in 2 clipping masks and 1 linked file on top (Desired).

When invoking via app.doScript, one clipping mask contains an unwanted rectangle that is filled with the default white w/black stroke. 

Why is this rectangle appearing and how can i get rid of it? 

Action, if it matters: 

Script, if it matters.

// https://gist.github.com/joonaspaakko/df2f9e31bdb365a6e5df

// Finds all .ai files from the input folder + its subfolders and converts them to the version given below in a variable called "targetVersion"

// Tested in Illustrator cc 2014 (Mac)
// Didn't bother to do a speed test with my macbook air...

#target illustrator

	// If set to false, a new file will be written next to the original file.
	// The new file will have (legacyFile) in the name.
	// Files with (legacyFile) in the file name are always ignored.
var overwrite = true, // boolean
	// Accepted values:
	// 8, 9, 10, 11 (cs), 12 (cs2), 13 (cs3), 14 (cs4), 15 (cs5), 16 (cs6), 17 (cc)
	targetVersion = 26;

if ( app.documents.length > 0 ) {

	alert("ERROR: \n Close all documents before running this script." );

}
// Run the script
else {

	var files,
		folder = Folder("O:/path//to//api//files");

	// If folder variable return null, user most likely canceled the dialog or
	// the input folder and it subfolders don't contain any .ai files.
	if ( folder != null ) {

		// returns an array of file paths in the selected folder.
		files = GetFiles( folder );

		// This is where things actually start happening...
		process( files );

	}

}


function process( files ) {

	// Loop through the list of .ai files:
	// Open > Save > Close > LOOP
	for ( i = 0; i < files.length; i++ ) {

		// Current file
		var file = files[i]

		// Open
		app.open( file );

		// If overwrite is false, create a new file, otherwise use "file" variable;
//		file = !overwrite ? new File( file.toString().replace(".ai", " (legacyFile).ai") ) : file;

		// Run your action
		app.doScript ("confidential", "confidential set");

	}

}

function GetFiles( folder ) {

	var i, item,
		// Array to store the files in...
		files = [],
		// Get files...
		items = folder.getFiles();

	// Loop through all files in the given folder
	for ( i = 0; i < items.length; i++ ) {

		item = items[i];

		// Find .ai files
		var fileformat = item.name.match(/\.jpg$/i);

		// If item is a folder, check the folder for files.
		if ( item instanceof Folder ) {

			// Combine existing array with files found in the folder
//			files = files.concat( GetFiles( item ) );


		}
		// If the item is a file, push it to the array.
		else if ( item instanceof File && fileformat ) {

			// Push files to the array
			files.push( item );

		}
	}

	return files;
}

[AJJ22656695e0lw · Accepted solution]

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There was an issue with the action. 

Troubleshot the action by turning steps off and running until a resolution was found.