Link broken in Space export to DOC format

When exporting a space to doc format, links that inside the exported doc file broken.

For example, the link that inside the page supposed to be
http://confluence-pc:5410/confluence/display/PDF/page1

but showed as below instead

Step to Replicate:

1. Create a new space with a few new pages.
2. At one of the page, insert a link macro and choose any pages that created recently(all pages are in the same space)
3. export the page to doc.