You should contact Imagiverse to see if they know anything about the images being removed. It is possible that there was a request to remove the images. For example, they may be under someone else's copyright. Not saying they are, just using it as a possible example of why skins are occasionally removed.
This doesn't appear to be a bug in the code, so you probably won't get any results from a bug tracker. You should try asking their customer support this question.
George T Henne Jr
You should contact Imagiverse to see if they know anything about the images being removed. It is possible that there was a request to remove the images. For example, they may be under someone else's copyright. Not saying they are, just using it as a possible example of why skins are occasionally removed.
This doesn't appear to be a bug in the code, so you probably won't get any results from a bug tracker. You should try asking their customer support this question.