Product and version : FileMaker Pro Server 15
OS and version : Windows 10
Browser and version : Chrome 56.0.2924.87
WebDirect does not manage a cache for images stored in a field. Each time the web page is refresh, it generate a new path. This increases uselessly WebDirect engine or FMS to generate each time a copy of the image en the hard drive. And as well the browser has to reload every images. WebDirect should manage a cache for container fields, even with multiple users connected to the same database.
HTML code produced for the same image :
How to replicate
With an image stored in a table container field, create a model with this field. See file test.