P: Setting firstLineIndent with Javascript not working

I have a javascript-program that worked in 2014 for adding text given in a text file to images as captions. Today I wanted to reuse it with Photoshop 21.1.1 and it ran almost succesfully. Only setting the indent for the created Text Item with the "firstLineIndent"-property is not taken; it is always 0, but  no errors are shown. 

textItemRef.firstLineIndent = 32;

...does not change that setting to 32 and does not throw an error.

JJMack thankfully tested the following script:

// Create Image with 1382 x 787 Pixel<br>app.preferences.rulerUnits = Units.PIXELS;

app.documents.add(1382, 787, 300, "Image Caption", NewDocumentMode.RGB);

createText("Caption", "Calibri", 8.0, 0, 0, 0, "Description Text", 5, 179, 324, 14, Justification.LEFT, 32, 0);function createText(lname, fface, size, colR, colG, colB, content, tX, tY, wdth, hght, just, indent, rot) {    // Add a new layer in the new document<br>    var artLayerRef = app.activeDocument.artLayers.add();<br>    artLayerRef.name = lname;<br>    // Specify that the layer is a text layer<br>    artLayerRef.kind = LayerKind.TEXT;<br>    artLayerRef.rotate(rot);    //This section defines the color of the text<br>    textColor = new SolidColor();<br>    textColor.rgb.red = colR;<br>    textColor.rgb.green = colG;<br>    textColor.rgb.blue = colB;    //Get a reference to the text item so that we can add the text and format it a bit<br>    textItemRef = artLayerRef.textItem;<br>    textItemRef.kind = TextType.PARAGRAPHTEXT;<br>    textItemRef.font = fface;<br>    textItemRef.color = textColor;<br>    textItemRef.size = size;    textItemRef.position = new Array(tX, tY); //pixels from the left, pixels from the top<br>    textItemRef.width = wdth;<br>    textItemRef.height = hght;    textItemRef.justification = just;<br>alert("textItemRef.firstLineIndent=" + textItemRef.firstLineIndent);<br>    textItemRef.firstLineIndent = indent;<br>alert("indent=" + indent + " textItemRef.firstLineIndent=" + textItemRef.firstLineIndent);    textItemRef.contents = content;<br>}

• It worked in CS6 Creative Cloud version 13.1.2 and CS3
• It does not work in CC 2014, CC 2018, CC 2019 or PS 2020