Image href using relative path fails to open in external editor

My team recently moved from Arbortext 5.4 to 6.1 M040. With the previous, version we could double-click an image and the image opened in our image editor. Now, double-clicking throws this error:

[A60329] Unable to open document: file:///C:/dita/source/web/task/..\image\image1.png

For context, our file structure keeps the DITA topic types and images in separate folders:

     web

          concept

          image

          reference

          task

          topic

It's as if Arbortext is trying to resolve the image but is appending an absolute path to the topic folder (i.e., task). We must use relative paths in our content so our build servers can create the documentation.

Any suggestions or help are welcome!