As an user, I can't export images from children issues on Structure

When we have images associated with an issue which is a children, if you want export the image you will receive the image associated to his father.
On the atlassian-jira-log we receive the following message:

Xporter-bbef7e41-3f6e-4120-ab2d-e60c11a25b4a ERROR admin 667x10869x1 1ct3o9a 10.70.10.95 /plugins/servlet/jirastructurexporter [c.x.j.c.d.b.i.a.w.replacer.processor.ImageProcessor] Error sorting individual images...java.lang.IndexOutOfBoundsException: Index: 0, Size: 0