What happened?

Summary

The height parameter of a Joomla editor form field is ignored when the editor is used inside a repeatable subform field.

The same editor configuration works correctly in regular Joomla forms (for example article editing), but not inside a module parameter subform.

Example

This issue can be reproduced with a module using a subform field:

Main module XML:

<field 
    name="items" 
    type="subform" 
    formsource="/modules/example/forms/item.xml" 
    multiple="true"
/>

Subform XML (item.xml):

<field 
    name="content" 
    type="editor" 
    label="Content" 
    width="100%" 
    height="400" 
    filter="raw"
/>

Steps to reproduce

1. Create a module with a repeatable subform field.
2. Add an editor field (type="editor") inside the subform XML.
3. Set a fixed editor height:

height="400"

4. Open the module in the Joomla administrator backend.
5. Open one of the repeatable subform items.

Expected result

The TinyMCE editor should initialize with the configured height.

The editor should respect:

height="400"

Actual result

The editor ignores the configured height and opens with a very small editing area.

The resize handle has to be dragged manually to make the editor usable.

Additional information

• The issue does not occur in Joomla article editing.
• The default Joomla editor works correctly outside of subforms.
• The issue appears only when the editor field is located inside a repeatable subform.
• Changing the height value in the XML has no effect.

Tested environment

• Joomla 6.1.2
• Default TinyMCE editor
• Administrator backend
• Module parameter form using repeatable subform fields

Example from a real extension

The issue was observed in the Joomlaplates mod_uk_slideshow module.

The subform contains:

<field 
    name="content" 
    type="editor" 
    label="MOD_UK_SLIDESHOW_FORM_CONTENT" 
    width="100%" 
    height="200" 
    filter="raw" 
    showon="cols!:0"
/>

The generated TinyMCE instance does not respect this height value.

Possible cause

The editor configuration values may not be passed correctly during TinyMCE initialization inside dynamically generated subform fields.

The initialization timing could also be related to the repeatable subform behavior, because the editor elements are created dynamically.

Suggested investigation

Verify whether editor field parameters such as:

• height
• rows
• editor options

are correctly transferred to the TinyMCE initialization when the editor is inside a subform field.

Version

6.1

Expected result

No response

Actual result

No response

System Information

No response

Additional Comments

No response