How to.........

Cannot call to mind any animated gifs currently at RR or ARRSE, Higs.

A few years ago my own once-animated Bob gif avatar became as shown - frozen forever after a major RR update.:(

Oddly enough OTOH the bubbles gif at my signature block has somehow survived every update.
PS. On this new site layout, can you explain how to do a signature block. I had no problems on the old site. Thanks in advance.