The Caption of an Unrecoverable Error is not Displayed in the Browser

Error messages take precedence over captions. If an error message and a caption are added to an unrecoverable error, only the error message will be displayed. If an error message is not added and a caption is present, then the caption will be displayed.

To work around this issue, add the content of the caption to the error message, or add only a caption and not an error message to an unrecoverable error.