I have set

DisableAutoFormatting="true"
UseRelativeLinks="true"
RemoveServerNamesFromUrl="true"

The server name is not included when I insert an image but if I cut an image from one area of the field and past it into another the server name is included.

But having set RemoveServerNamesFromUrl = true, shouldn't the server name be stripped out then the form is submitted.

This only seems to happen when DisableAutoFormatting = true. If DisableAutoFormatting = false and I past the image in the server name is not included.