Hi,
As a test, are you able to update the image in the following way:
Essentially, on construct with a short delay to manually add a new texture image. Does this work for you? In the above example, it works for me using 4.26.2.
If you are able to successfully do this, then we need to debug what is being returned from this Item Image parameter, and we need to verify if your custom event, Event Pressed Equip Item, is being called.