Cast node not saving image value

Configuration
1

Hi there,

I’m trying to get an image to display when I have an alarm disarm tts fired to a Google home hub.

When I input the url to the image and then close the edit pane, the url details have disappeared when I open the edit pane again.

Is this a bug?

2

Also - just to add, I have tried using call service as a separate node to send the image which works, but it is then cancelled out by the audio file.