We use Map Viewer Classic and it was just pointed out to me that in one of our maps photos attached to features are no longer available.
We are a water utility and this is about a set of our production features. It has been added to the map as a map image layer. When I test it out in a new map, at first the option to view attachments is there:

But, for this map, we want to symbolize our mains differently than the custom one from when it was first published. When I change the symbology to be by diameter, the check box is gone and attachments are not available in any of the feature classes grouped into that map image layer.

The symbology of that one feature class is the only thing I've changed.
This didn't happen when I added the feature layer, but for the map this is in, I would like to not use the feature layer.
Is there some way around this so the attachments can still be viewed?