Labels disappear if edited at all

[RyShissler_Welland]

I'm using Enterprise 10.9.1. We received a report about our public IMS that labels weren't showing for our zoning map image layer. We republished the layer and labels reappeared 👏 However, if I try to edit any attribute of the labels (visible range, font size, etc.) the labels disappear and can't be recovered. 

Default label settings

Changed visible range by 1 level