As 2015 written in mailing list (https://lists.xwiki.org/pipermail/users/2015-September/030992.html) we face this problem again.
An animated gif resized isn’t animated anymore.
[[image:Archiv IN.gif||alt="IN" height="500" width="415"]]
This is animated:
[[image:Archiv IN.gif||alt="IN"]]
We are using XWiki 13.10.6. Do we something wrong?
Regards, Simpel