**List of steps to reproduce** (step by step, including full links if applicable):
* create a form with an "uploadable" field (in my case: input type=combobox) with the image preview option
* then edit a page with this form and fill in a value in the given field (either by uploading an image or by changing the value directly)
**What happens?**:
Using the field only shows the image if the field was filled in a previous save of the form. The image is not updated if the field value is changed.
**What should have happened instead?**:
A preview of the image corresponding to the field value should appear below the field.
**Software version (if not a Wikimedia wiki), browser information, screenshots, other information, etc.**:
MW 1.35.4 / PHP 7.4.27 / MariaDB 10.1.48 / SMW 3.2.0 / PF 5.3.4