When using a Popup-Template with the attachment type like so
I am missing the thumnail of the image. I looks like this:
There are also no Thumbnails shown in "list" mode but I am not sure if thats always the case:
I was searching around a bit and found a property in the API documentation called "supportsResizeAttachments" (Link). This property is "false" for our feature layer. But it is also read-only.
The features are coming from an ArcGIS Server FeatureServer. I tried finding anything in the ArcGIS Server Manager and the ArcGIS Server Admin but couldnt find the property or anything else that might be related.
Has anyone ever encountered that problem and knows a solution?
Thanks for your help.