Thank you for your post.
This issue exists with FileMaker Server 14.0.3 and earlier. However, this issue was addressed in FileMaker Server 14.0.4.
Can you verify the version of FileMaker Server 14 you are using? Assuming you have an earlier version of FileMaker Server 14 installed, please update to the latest version (14.0.4a) through Knowledge Base Article #15413: