After-death running Bard model [GAMEPLAY]

I've heard about it happening a couple of times from watching various streams. I just snapped a Twitch clip of this happening on NB3's stream and he states "it's the first time i've seen this bug". I do not know how to re-create this occurrence but it seems to happen only to Bard (there may be others idk) when he dies. After he dies, a running model of said champion can be seen running. I do not know how long this bug occurs for.