Word Preview Macro showing wrong attachments versions

Steps to reproduce:

• You upload three versions of a attachment.
• Then you delete the two latest versions, coming back to the first version.
• The Word preview macro will correctly go back and show the preview of the first version.
• Then you upload a new second version, totally diferent from the other ones.
• The Word preview macro will show the other second version (first one) which has already been deleted.
• Same happens when you upload a third version.
• Downloading the file attached will download the correct file, so the issue is not on the Attachments macro, it is on the Word Preview Macro.

Restarting Confluence doesn't change the sympton.

Customer is running Confluence 5.7.3 and I was able to replicate the same issue on 5.4.1.

The customer recorded a screencast for a better understanding of the issue: https://support.atlassian.com/secure/attachment/1127505/1127505_Recording+%231.mp4